US4041476A — Method, medium and apparatus for producing three-…

Claim 1

Independent Claim 90 words

A method of generating a three-dimensional pattern in a volume of material comprising the steps of: a. generating control signals specifying the coordinate positions of a plurality of points within a volume of material which is capable of undergoing a change in optical properties in response to energy level changes within said volume, and b. generating in response to said control signals energy level changes which cooperate within said volume at selected locations therein corresponding to said coordinate positions to produce the simultaneous visual display of said plurality of points.

Claim 2

Independent Claim 90 words

A method of generating a three-dimensional pattern in a volume of material comprising the steps of: a. generating control signals specifying the coordinate positions of a plurality of points within a volume of material which is capable of undergoing a change in optical properties in response to energy level changes within said volume, and b. generating in response to said control signals energy level changes which cooperate within said volume at selected locations therein corresponding to said coordinate positions to produce the simultaneous visual display of said plurality of points.

Claim 3

Independent Claim 92 words

A method of generating a pattern containing three-dimensional information in a medium of material comprising the steps of: a. producing control signals specifying the coordinate positions of a plurality of points of a three-dimensional pattern; and b. generating, in response to said control signals and within a medium of material which is capable of undergoing a change in optical properties in response to energy level changes within said medium, energy level changes which cooperate within said medium to produce therein an optical pattern representing a three-dimensional display of said plurality of points.

Claim 4

Independent Claim 92 words

A method of generating a pattern containing three-dimensional information in a medium of material comprising the steps of: a. producing control signals specifying the coordinate positions of a plurality of points of a three-dimensional pattern; and b. generating, in response to said control signals and within a medium of material which is capable of undergoing a change in optical properties in response to energy level changes within said medium, energy level changes which cooperate within said medium to produce therein an optical pattern representing a three-dimensional display of said plurality of points.

Claim 5

Dependent Claim 44 words

A method as defined in claim 2 wherein said generating step further comprises: a. generating first and second radiations having at least two different radiation states; and b. directing said radiations onto said medium so that they cooperate therein to produce said optical pattern.

Claim 6

Independent Claim 91 words

A method of generating a three-dimensional pattern in a volume of material comprising the steps of: a. generating at least two radiations within respective ones of two distinct wavelength ranges, which radiations cause the volume of material to undergo a change in optical properties so as to exhibit at least two discernibly different states, and b. directing said two radiations into said volume of material to cooperate at selected locations corresponding to the coordinate positions of a plurality of points to produce the simultaneous visual display of said plurality of points.

Claim 7

Independent Claim 91 words

A method of generating a three-dimensional pattern in a volume of material comprising the steps of: a. generating at least two radiations within respective ones of two distinct wavelength ranges, which radiations cause the volume of material to undergo a change in optical properties so as to exhibit at least two discernibly different states, and b. directing said two radiations into said volume of material to cooperate at selected locations corresponding to the coordinate positions of a plurality of points to produce the simultaneous visual display of said plurality of points.

Claim 8

Dependent Claim 35 words

A method as recited in claim 4 further comprising the step of directing said two radiations into said material to cooperate at selected locations corresponding to at least the approximate coordinate positions of a line.

Claim 9

Dependent Claim 44 words

A method as recited in claim 5 wherein the step of directing said two radiations to cooperate at selected locations corresponding to the coordinate positions of a line includes the step of continuously sweeping said two radiations in cooperative relationship one with the other.

Claim 10

Dependent Claim 24 words

A method as recited in claim 6 further comprising the step of blanking at least one of said two radiations to terminate said line.

Claim 11

Dependent Claim 105 words

A three-dimensional pattern generator comprising: a. a medium which is capable of undergoing a change in optical properties in response to energy level changes within said medium; b. means for generating within said medium said changes in energy levels; and c. computing and control means for receiving input data specifying the coordinate positions of a plurality of points of a three-dimensional pattern and for computing control signals from said data, said generating means being responsive to said control signals to cause said changes in energy levels to cooperate within said medium to produce therein an optical pattern representing the three-dimensional display of said three-dimensional pattern.

Claim 12

Dependent Claim 105 words

A three-dimensional pattern generator comprising: a. a medium which is capable of undergoing a change in optical properties in response to energy level changes within said medium; b. means for generating within said medium said changes in energy levels; and c. computing and control means for receiving input data specifying the coordinate positions of a plurality of points of a three-dimensional pattern and for computing control signals from said data, said generating means being responsive to said control signals to cause said changes in energy levels to cooperate within said medium to produce therein an optical pattern representing the three-dimensional display of said three-dimensional pattern.

Claim 13

Dependent Claim 25 words

A three-dimensional dimensional pattern generator as defined in claim 8 wherein said optical pattern is a visible real three-dimensional display of said plurality of points.

Claim 14

Dependent Claim 158 words

A three-dimensional pattern generator as defined in claim 9 wherein: a. said change in optical properties causes said medium to exhibit at least two discernibly different optical states and wherein said medium is responsive to radiation having at least two distinct radiation states to produce said change in optical properties; and b. said generating means comprises: 1. radiation means for generating at least two radiations having respective ones of said radiation states; and 2. means for directing the radiations from said radiation means into said medium wherein said medium is caused to pass between said two discernibly different states under the cooperative effect of said two radiations; and 3. said directing means is responsive to said control signals to direct said two radiations from said radiation means into said medium to cooperate therein and produce therein an optical pattern of said two discernibly different optical states, said optical pattern representing a three-dimensional display of said plurality of points.

Claim 15

Dependent Claim 108 words

A pattern generator as defined in claim 10 wherein said medium is a volume of material and said two discernibly different optical states are a ground state and an excited state, and said two different radiation states are two different wavelengths in the light specturm, whereby the cooperative action of said radiations causes said material to be selectively raised to said excited state at selected locations corresponding to said plurality of points, from which locations visible radiations is emitted due to the transition of said material from said excited state to said ground state, thereby producing in said volume a real three-dimensional display of said plurality of points.

Claim 16

Dependent Claim 63 words

A pattern generator as defined in claim 10 wherein said control signals comprise: a. a first control signal for controlling a first of said radiations in a direction corresponding to two coordinates of each of said points; and b. a second control signal for controlling the second of said radiations in a direction corresponding at least to the third coordinate of each point.

Claim 17

Dependent Claim 104 words

A three-dimensional pattern generator comprising: a. a volume of material which is capable of undergoing a change in optical properties in response to energy level changes within the said volume, b. directional means for generating within said volume said changes in energy levels, and c. computing and control means for receiving input data specifying the coordinate positions of a plurality of points and computing therefrom control signals, said directional means being responsive to said control signals to cause said changes in energy levels to cooperate within said volume of material at selected locations therein corresponding to the coordinate positions of said plurality of points.

Claim 18

Dependent Claim 104 words

A three-dimensional pattern generator comprising: a. a volume of material which is capable of undergoing a change in optical properties in response to energy level changes within the said volume, b. directional means for generating within said volume said changes in energy levels, and c. computing and control means for receiving input data specifying the coordinate positions of a plurality of points and computing therefrom control signals, said directional means being responsive to said control signals to cause said changes in energy levels to cooperate within said volume of material at selected locations therein corresponding to the coordinate positions of said plurality of points.

Claim 19

Dependent Claim 19 words

A pattern generator as recited in claim 13 further comprising means for erasing a spot displayed in said volume.

Claim 20

Dependent Claim 70 words

A pattern generator as defined in claim 13 a. wherein said volume responds to the intersections of a pair of electronic beams to cause said energy level changes, b. and wherein said directional means comprises: 1. means for generating a pair of electronic beams, and 2. beam directing means for directing at least one of said electronic beams to cause them to cooperate within said volume at said selected locations.

Claim 21

Dependent Claim 36 words

A pattern generator as defined in claim 15 wherein said volume responds to the intersections of electron beams in space, and wherein said generating means comprises means for generating a pair of electron beams in space.

Claim 22

Dependent Claim 111 words

A pattern generator as recited in claim 13 wherein said computing and control means comprises: a. a display computer for receiving said input data and providing outputs for each of said plurality of points, said outputs defining said control signals, b. a display memory for storing said outputs from said display computer, said display memory being connected to said directional means to transmit thereto said control signals, and c. control means connected to said display computer, and to said display memory for controlling the transfer of said outputs to said display memory and for causing said control signals to be periodically read out of said display memory to said directional means.

Claim 23

Dependent Claim 18 words

A pattern generator as recited in claim 17 further comprising an analog computer for computing the control signals.

Claim 24

Dependent Claim 29 words

A pattern generator as recited in claim 17 wherein said computing and control means further comprises a manual input means for inputting data and commands to said display computer.

Claim 25

Dependent Claim 19 words

A pattern generator as recited in claim 17 further comprising means for erasing a spot displayed in said volume.

Claim 26

Dependent Claim 163 words

A three-dimensional pattern generator comprising: a. a volume of material which is capable of undergoing a change in optical properties so as to exhibit at least two discernibly different states and responsive to radiation having at least two distinct radiation states to produce said change in optical properties, b. radiation means for generating at least two radiations having respective ones of said radiation states, c. means for directing the radiations from said radiation means into said volume of material wherein said material is caused to pass between said two discernibly different states under the cooperative effect of said two radiations, and d. computing and control means for receiving input data specifying the coordinate positions of a plurality of points, and computing therefrom direction control signals, said directing means being responsive to said direction signals to direct said two radiations from said radiation means within said volume of material to cooperate at selected locations corresponding to the coordinate positions of said plurality of points.

Claim 27

Dependent Claim 163 words

A three-dimensional pattern generator comprising: a. a volume of material which is capable of undergoing a change in optical properties so as to exhibit at least two discernibly different states and responsive to radiation having at least two distinct radiation states to produce said change in optical properties, b. radiation means for generating at least two radiations having respective ones of said radiation states, c. means for directing the radiations from said radiation means into said volume of material wherein said material is caused to pass between said two discernibly different states under the cooperative effect of said two radiations, and d. computing and control means for receiving input data specifying the coordinate positions of a plurality of points, and computing therefrom direction control signals, said directing means being responsive to said direction signals to direct said two radiations from said radiation means within said volume of material to cooperate at selected locations corresponding to the coordinate positions of said plurality of points.

Claim 28

Dependent Claim 57 words

A pattern generator as defined in claim 21 wherein said two radiations are two rays of a single radiation beam and said two distinct radiation states are two different propagation vectors of the two respective rays, and wherein said material is thermochromic material, and further comprising means for focusing said single radiation beam at said selected locations.

Claim 29

Dependent Claim 17 words

A pattern generator as defined in claim 21 wherein said radiation means comprises a thermal light source.

Claim 30

Dependent Claim 17 words

A pattern generator as recited in claim 21 wherein said radiation means comprises coherent light source means.

Claim 31

Dependent Claim 24 words

A pattern generator as recited in claim 24 wherein said radiation means comprises at least one laser that generates said at least two radiations.

Claim 32

Dependent Claim 26 words

A pattern generator as recited in claim 24 wherein said radiation means comprises two lasers each generating a respective one of said at least two radiations.

Claim 33

Dependent Claim 22 words

A pattern generator as defined in claim 21 wherein said two distinct radiation states are two different wavelengths in the light spectrum.

Claim 34

Dependent Claim 80 words

A pattern generator as recited in claim 27 wherein said computing and control means includes line generating means for receiving data that define a line which is to be displayed within said volume of material and computing therefrom line deflection control signals, said directing means being responsive to said line deflection control signals for directing the radiations from said radiation means within said material to cooperate at selected locations corresponding to at least the approximate coordinate positions of said line.

Claim 35

Dependent Claim 33 words

A pattern generator as defined in claim 18 further comprising means responsive to the line-defining data for repeatedly directing said radiations in sequence along the co-ordinate positions of the line to be displayed.

Claim 36

Dependent Claim 28 words

A pattern generator as recited in claim 21 wherein said material exhibiting at least two discernibly different states includes material with at least two nonradiation emissive discernible states.

Claim 37

Dependent Claim 33 words

A pattern generator as recited in claim 30 wherein one of said discernibly different states is substantially optically clear while the other of said discernibly different states is a substantially darkened optical state.

Claim 38

Dependent Claim 20 words

A pattern generator as recited in claim 31 wherein said volume of material includes a volume of photoreversible photochromic material.

Claim 39

Dependent Claim 19 words

A pattern generator as recited in claim 31 wherein said volume of material includes a volume of thermochromic material.

Claim 40

Dependent Claim 27 words

A pattern generator as recited in claim 21 wherein said material exhibiting at least two discernibly different stages includes material with at least one radition-emitting discernible state.

Claim 41

Dependent Claim 72 words

A pattern generator as recited in claim 34 wherein said material is capable of existing in a ground state and in at least one excited state, whereby said material is selectively raised to said excited state by the cooperative action of said two radiations from said radiation means as said selected locations from which radiation is emitted due to the transition of said medium from said excited state to a lower state.

Claim 42

Dependent Claim 50 words

A pattern generator as recited in claim 35 wherein said volume of material is composed of a suspension of particles of a phosphor, said phosphor being capable of being excited by one of said two radiations from said radiation means and further excited by the other of said two radiations.

Claim 43

Dependent Claim 137 words

A pattern generator as recited in claim 34 wherein said material is capable of existing in a ground state and in at least two excited states and wherein the energy of one of said two radiations from said radiation means corresponds to the transition of said material from said ground state to a first excited state while the energy of the radiation from the other of said two radiations is sufficient to raise said material to a second excited state after it has been raised to said first excited state, whereby said material is selectively excited by the cooperative effect of said two radiations from said radiation means to said second state at said selected locations from which radiation is emitted due to the transition of said material from said second excited state to a lower state.

Claim 44

Dependent Claim 38 words

A pattern generator as recited in claim 37 wherein said material is composed of a fluid including particles dispersed throughout said volume which are each capable of existing in a ground state and a plurality of excited states.

Claim 45

Dependent Claim 15 words

A pattern generator as recited in claim 37 wherein said material is a gaseous substance.

Claim 46

Dependent Claim 26 words

A pattern generator as defined in claim 21 wherein said direction control signals are digital deflection signals, and wherein said directing means comprises radiation deflection means.

Claim 47

Dependent Claim 16 words

A pattern generator as recited in claim 40 wherein said deflection means comprises an electro-optic deflector.

Claim 48

Dependent Claim 17 words

A pattern generator as recited in claim 40 wherein said deflection means comprises an acoustic-optical light deflector.

Claim 49

Dependent Claim 36 words

A pattern generator as recited in claim 40 wherein said deflection means includes digital deflection means for producing deflection of at least one of said two radiations directly in response to said digital deflection control signals.

Claim 50

Dependent Claim 15 words

A pattern generator as recited in claim 40 wherein said deflection means comprises Galvanometer-mirror deflectors.

Claim 51

Dependent Claim 84 words

A pattern generator as recited in claim 44 wherein said Galvanometer-mirror deflectors comprise: a. at least one mirror for reflecting each of said two radiations, b. a Galvanometer movement for each mirror, said mirrors being mechanically attached for pivotal displacement with the coils of said movements, and c. A digital-to-analog converter for converting said digital deflection control signals to proportional electrical currents, said currents being supplied to said coils to thereby produce a displacement of said mirrors and a resulting deflection of said radiations.

Claim 52

Independent Claim 141 words

A method of generating a three-dimensional pattern within a volume of photoreversible photochromic material which may be caused to pass from a substantially clear optical state to a darkened optical state upon the application of darkening radiation and also which may be caused to pass from the darkened optical state into a substantially clear optical state by application of bleaching radiation, comprising the steps of: scanning a bleaching radiation beam having a sharp intensity cut off at its trailing edge through at least a portion of said volume of material, and passing a darkening radiation beam through the volume of material flooded with the bleaching radiation beam to the trailing edge thereof, whereby darkened spots may be successively formed in various preselected locations within said volume where the darkening radiation beam intersects with the trailing edge of the bleaching radiation beam.

Claim 53

Independent Claim 141 words

A method of generating a three-dimensional pattern within a volume of photoreversible photochromic material which may be caused to pass from a substantially clear optical state to a darkened optical state upon the application of darkening radiation and also which may be caused to pass from the darkened optical state into a substantially clear optical state by application of bleaching radiation, comprising the steps of: scanning a bleaching radiation beam having a sharp intensity cut off at its trailing edge through at least a portion of said volume of material, and passing a darkening radiation beam through the volume of material flooded with the bleaching radiation beam to the trailing edge thereof, whereby darkened spots may be successively formed in various preselected locations within said volume where the darkening radiation beam intersects with the trailing edge of the bleaching radiation beam.

Claim 54

Dependent Claim 39 words

A method according to claim 46 wherein the step of passing a darkening radiation beam includes passing a narrow collimated darkening radiation beam through the volume of material flooded with the bleaching radiation beam to the trailing edge thereof.

Claim 55

Dependent Claim 122 words

A three-dimensional display system, comprising: a volume of photoreversible photochromic material having at least two discernibly different optical states wherein said material may be caused to pass from a substantially clear optical state to a darkened optical state by application of darkening optical electromagnetic radiation within a first range of wavelengths, and wherein said material may be caused to pass from a darkened optical state to a substantially clear optical state by application of bleaching optical electromagnetic radiation within a second distinct band of wavelengths, and display means cooperatively associated with said volume of material for simultaneously applied to said volume radiation intensity of both darkening and bleaching radiation to generate darkened spots in at least two preselected locations within said volume.

Claim 56

Dependent Claim 122 words

A three-dimensional display system, comprising: a volume of photoreversible photochromic material having at least two discernibly different optical states wherein said material may be caused to pass from a substantially clear optical state to a darkened optical state by application of darkening optical electromagnetic radiation within a first range of wavelengths, and wherein said material may be caused to pass from a darkened optical state to a substantially clear optical state by application of bleaching optical electromagnetic radiation within a second distinct band of wavelengths, and display means cooperatively associated with said volume of material for simultaneously applied to said volume radiation intensity of both darkening and bleaching radiation to generate darkened spots in at least two preselected locations within said volume.

Claim 57

Dependent Claim 39 words

A three-dimensional display system according to claim 48 wherein said display means includes means to form and direct simultaneously said darkening radiation in at least two beams to said at least two preselected locations within said volume of material.

Claim 58

Dependent Claim 46 words

A three-dimensional display system according to claim 48, wherein said display means additionally includes means for flooding with bleaching radiation at least those portions of the volume of material through which said at least two beams of darkening radiation pass prior to reaching said preselected locations.

Claim 59

Dependent Claim 120 words

A three-dimensional display system, comprising: a volume of photoreversible photochromic material having at least two discernibly different optical states wherein said material may be caused to pass from a substantially clear optical state to a darkened optical state by application of darkening optical electromagnetic radiation within a first range of wavelengths, and wherein said material may be caused to pass from darkened optical state to a substantially clear optical state by application of bleaching optical electromagnetic radiation within a second distinct band of wavelengths, and display means cooperatively associated with said volume of material for simultaneously applying to said volume radiation intensity of both darkening and bleaching radiation to generate a darkened spot at a preselected location within said volume.

Claim 60

Dependent Claim 120 words

A three-dimensional display system, comprising: a volume of photoreversible photochromic material having at least two discernibly different optical states wherein said material may be caused to pass from a substantially clear optical state to a darkened optical state by application of darkening optical electromagnetic radiation within a first range of wavelengths, and wherein said material may be caused to pass from darkened optical state to a substantially clear optical state by application of bleaching optical electromagnetic radiation within a second distinct band of wavelengths, and display means cooperatively associated with said volume of material for simultaneously applying to said volume radiation intensity of both darkening and bleaching radiation to generate a darkened spot at a preselected location within said volume.

Claim 61

Dependent Claim 95 words

A three-dimensional display system according to claim 51 wherein said display means includes: means for flooding bleaching radiation through something less than full volume of material in a beam with sharp intensity cut off on at least one surface thereof, and means for directing a beam of darkening radiation through that portion of the volume of material flooded by said bleaching radiation flooding means to intersect with a surface of said bleaching radiation beam at which there is a sharp intensity cut off from within the beam, thereby forming a darkened spot at said intersection.

Claim 62

Dependent Claim 42 words

A three-dimensional display system according to claim 52 which additionally comprises means for scanning said bleaching radiation beam and said darkening radiation beam cooperatively through the volume of material to form a series of darkened spots at a series of preselected locations.

Claim 63

Dependent Claim 35 words

A three-dimensional display system according to claim 53 wherein said volume of photochromic material exhibits greater radiation absorption of said darkening radiation in said material's darkened optical state than in said material's clear optical state.

Claim 64

Dependent Claim 32 words

A three-dimensional display system according to claim 51 wherein said display means includes means to form and direct said darkening radiation in beam to said preselected location within said volume of material.

Claim 65

Dependent Claim 43 words

A three-dimensional display system according to claim 55 wherein said display means additionally includes means for flooding with bleaching radiation at least that portion of the volume of material through which said beam of darkening radiation passes prior to reaching said preselected location.

Claim 66

Dependent Claim 33 words

A three-dimensional display system according to claim 56 wherein said volume of material exhibits greater adsorption of the darkening radiation in said material's darkened optical state than in said material's clear optical state.

Claim 67

Dependent Claim 34 words

A three-dimensional display system according to claim 56 wherein said display means includes additional means for flooding with bleaching radiation in regions beyond said preselected location through which said beam of darkening radiation passes.

Claim 68

Dependent Claim 37 words

A three-dimensional display system according to claim 56 wherein said display means additionally includes means for flooding the entire volume with bleaching radiation of an intensity sufficient to bleach any prior display before forming a new display.

Claim 69

Dependent Claim 124 words

A three-dimensional pattern generator, comprising: A volume of material having at least two discernibly different non-radiation emissive states and responsive to radiation intensity within at least two distinct wavelength ranges, wherein said material passes from a first to a second of said stages upon application of radiation within a first of said distinct wavelength ranges, and wherein said material passes from the second to the first of said states upon application of radiation within a second of said distinct wavelength ranges, and pattern generation means cooperatively associated with said volume of material for simultaneously applying controlled levels of radiation intensity within the first and second of said distinct wavelength ranges to generate a discernible spot at a preselected location within said volume of material.

Claim 70

Dependent Claim 124 words

A three-dimensional pattern generator, comprising: A volume of material having at least two discernibly different non-radiation emissive states and responsive to radiation intensity within at least two distinct wavelength ranges, wherein said material passes from a first to a second of said stages upon application of radiation within a first of said distinct wavelength ranges, and wherein said material passes from the second to the first of said states upon application of radiation within a second of said distinct wavelength ranges, and pattern generation means cooperatively associated with said volume of material for simultaneously applying controlled levels of radiation intensity within the first and second of said distinct wavelength ranges to generate a discernible spot at a preselected location within said volume of material.

Claim 71

Dependent Claim 20 words

A three-dimensional pattern generator according to claim 60, wherein said volume of material includes a volume of photoreversible photochromic material.

Claim 72

Dependent Claim 16 words

A three-dimensional pattern generator according to claim 61 wherein said first state is substantially optically clear.

Claim 73

Dependent Claim 28 words

A three-dimensional pattern generator according to claim 60 wherein said material has at least two discernibly different states, said states being at least two discernibly different optical states.

Claim 74

Dependent Claim 16 words

A three-dimensional pattern generator according to claim 63 wherein said radiation intensity includes electromagnetic radiation intensity.

Claim 75

Dependent Claim 37 words

A three-dimensional pattern generator according to claim 60 wherein said pattern generation means includes means to form and direct a beam of radiation within said first wavelength range to said preselected location within said volume of material.

Claim 76

Dependent Claim 48 words

A three-dimensional pattern generator according to claim 65 wherein said pattern generation means additionally includes means for flooding with radiation of said second wavelength range at least portions of said volume of material through which said beam within said first wavelength range passes before reaching said predetermined location.

Claim 77

Dependent Claim 29 words

A three-dimensional pattern generator according to claim 66 wherein said volume of material has at least two discernibly different states, said states being at least two discernible optical states.

Claim 78

Dependent Claim 35 words

A three-dimensional pattern generator according to claim 60 which additionally comprises readout radiation means for illuminating the volume of material to detect the non-radiation emissive state of the preselected location within said volume of material.

Claim 79

Dependent Claim 35 words

A three-dimensional pattern generator according to claim 68 wherein said pattern generation means includes means for bringing radiation within said first wave-length range to a focus at said pre-selected location within said volume of material.

Claim 80

Dependent Claim 50 words

A three-dimensional pattern generator according to claim 69 wherein the pattern generation means additionally includes means for flooding with radiation of said second distinct wavelength range at least regions within the volume of material through which said radiation beam of the first wavelength range passes before reaching said preselected location.

Claim 81

Dependent Claim 37 words

A pattern generator according to claim 70 wherein the pattern generator means additionally includes means for scanning said radiation of first and second wavelength ranges throughout the volume of material to form a succession of discernible spots.

Claim 82

Dependent Claim 33 words

A three-dimensional pattern generator according to claim 70 wherein said volume of material having at least two discernibly different states includes a volume of material having at least two discernibly different optical states.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1980-08-08	1981-02-07	1981-08-09	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1984-08-08	1985-02-07	1985-08-09	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1988-08-08	1989-02-07	1989-08-09	$7700.00	Window Closed / Lapsed

Method, medium and apparatus for producing three-dimensional figure product

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag