US3885966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive silver halide layers and process
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1973-05-07
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Granted: 1975-05-27
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Expires: 1993-05-07
Abstract
Abstract This disclosure concerns a process of producing photographic images by photoexposing a photosensitive silver halide layer of less than 2 microns thickness and subsequently physically developing the exposed layer to obtain a visible image. The preferred silver halide layers are of a thickness of less than 1 micron. The resulting photo-images are characterized by extremely high resolution, especially resolution required for halographic imaging and reproduction. Additionally, the images are adherently bonded to the film substrate. There is a need for silver halide layers which give high order resolution, for example as required in holography. Additionally, particularly in the production of photographic film, printing plates, nameplates and electrical printed circuits and components, there is need for silver halide layers which yield metal images that are adherently bonded to the layer substrates. The present invention provides a solution to the said needs and additionally provides this solution by way of extremely rapid anad facile processing chemistry.
Inventors
- 👤 Robert F Gracia
- 👤 Richard A Laughrey
- 👤 Paul F Tuohey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:52
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/26; G03G13/28; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; G03C1/52; G03C1/62; G03C5/00; G03C5/58; G03F; G03F7/00; G03F7/004; G03F7/0042; G03F7/0043; G03F7/06; G03G17/00; G03G17/02
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
43 words
IN A PHOTOSENSTIVE MEDIUM, THE IMPROVEMENT WHEREIN THE PHOTOSENSITIVE LAYER COMPRISES SILVER HALIDE AND A BINDER, SAID LAYER BEING OF LESS THAN 1 MICRON THICKNESS DEPOSITED ON A SUBSTRATE SELECTED FROM THE GROUP CONSISTING OF A HYDROPHOBIC PHOTOGRAPHIC FILM AND A PAPER SUBSTRATE.
Claim 2
Dependent Claim
43 words
IN A PHOTOSENSTIVE MEDIUM, THE IMPROVEMENT WHEREIN THE PHOTOSENSITIVE LAYER COMPRISES SILVER HALIDE AND A BINDER, SAID LAYER BEING OF LESS THAN 1 MICRON THICKNESS DEPOSITED ON A SUBSTRATE SELECTED FROM THE GROUP CONSISTING OF A HYDROPHOBIC PHOTOGRAPHIC FILM AND A PAPER SUBSTRATE.
Claim 3
Dependent Claim
20 words
Medium as in Calim 1 wherein the photosensitive layer is a subbing layer adherently bonded to a hydrophobic film substrate.
Claim 4
Dependent Claim
20 words
Medium as in Calim 1 wherein the photosensitive layer is a subbing layer adherently bonded to a hydrophobic film substrate.
Claim 5
Dependent Claim
12 words
Medium as in claim 2 wherein the binder comprises an emulsion polymer.
Claim 6
Dependent Claim
11 words
Mmedium as in claim 3 wherein the binder additionally comprises gelatin.
Claim 7
Dependent Claim
112 words
A sheet material comprising a hydrophobic film support having superposed thereon in succession a layer (A) which is directly adherent to the hydrophobic film support and comprises a copolymer formed from 45-99.5% by weight of at least one of the chloride containing vinylidene chloride and vinyl chloride, from 0.5 to 10% by weight of an ethylenically unsaturated hydrophilic monomer, and from 0 to 54.5% by weight of at least one other copolymerizable ethylenically unsaturated monomer; and a photosensitive layer (B) comprising silver halide and a binder comprising an emulsion polymer which provides an adherent bond between layers A and B, and wherein layer B has a thickness less than about 1 micron.
Claim 8
Dependent Claim
112 words
A sheet material comprising a hydrophobic film support having superposed thereon in succession a layer (A) which is directly adherent to the hydrophobic film support and comprises a copolymer formed from 45-99.5% by weight of at least one of the chloride containing vinylidene chloride and vinyl chloride, from 0.5 to 10% by weight of an ethylenically unsaturated hydrophilic monomer, and from 0 to 54.5% by weight of at least one other copolymerizable ethylenically unsaturated monomer; and a photosensitive layer (B) comprising silver halide and a binder comprising an emulsion polymer which provides an adherent bond between layers A and B, and wherein layer B has a thickness less than about 1 micron.
Claim 9
Dependent Claim
26 words
Sheet as in claim 5 wherein layer B has a thickness less than about 0.5 micron and wherein the binder of layer B additionally comprises gelatin.
Claim 10
Dependent Claim
68 words
A process for producing a photographic metal image comprising the steps of exposing an imaging medium comprising a photoseNsitive silver halide layer of less than about two microns in thickness on a substrate selected from the group consisting of a hydrophobic photographic film and a paper substrate and contacting the imaging medium to image forming materials comprising a solution of metal ions to thereby deposit, a metal image.
Claim 11
Dependent Claim
68 words
A process for producing a photographic metal image comprising the steps of exposing an imaging medium comprising a photoseNsitive silver halide layer of less than about two microns in thickness on a substrate selected from the group consisting of a hydrophobic photographic film and a paper substrate and contacting the imaging medium to image forming materials comprising a solution of metal ions to thereby deposit, a metal image.
Claim 12
Dependent Claim
31 words
Process as in claim 7 wherein the image forming materials comprise a unitary solution of silver ions, a reducing agent for these silver ions and a surfactant as a stabilizing agent.
Claim 13
Dependent Claim
53 words
In a photosensitive silver halide medium, the improvement wherein the photosensitive layer comprises silver halide and a binder, said layer being less than 1 micron in thickness deposited directly on a substrate, said layer having been deposited on said substrate by coating said substrate with an emulsion comprising silver halide and a binder.
Claim 14
Dependent Claim
53 words
In a photosensitive silver halide medium, the improvement wherein the photosensitive layer comprises silver halide and a binder, said layer being less than 1 micron in thickness deposited directly on a substrate, said layer having been deposited on said substrate by coating said substrate with an emulsion comprising silver halide and a binder.
Claim 15
Dependent Claim
19 words
Medium as in claim 9 where in the thickness of the photosensitive layer is less than about 0.5 micron.
Claim 16
Dependent Claim
27 words
Medium as in claim 10 wherein the amount of silver halide present on the substrate based upon the weight of silver is less than about 0.5 g/m2.
Claim 17
Dependent Claim
17 words
Medium as in claim 9 wherein the silver halide particle size is less than about 500 A.
Claim 18
Dependent Claim
97 words
Process of forming a metal image adherently bonded to a substrate comprising (1) mixing silver halide and a binder to form a photosensitive emulsion, (2) coating this emulsion directly on a substrate in an amount such that the dry thickness of the resulting photosensitive layer will be less than about 2 microns (3) drying said emulsion, (4) imagewise exposing the coated substrate, and (5) contacting the support with a physical developer comprising a solution of metal ions and a reducing agent for these metal ions to selectively deposit the metal in exposed portions of the photosensitive layer.
Claim 19
Dependent Claim
97 words
Process of forming a metal image adherently bonded to a substrate comprising (1) mixing silver halide and a binder to form a photosensitive emulsion, (2) coating this emulsion directly on a substrate in an amount such that the dry thickness of the resulting photosensitive layer will be less than about 2 microns (3) drying said emulsion, (4) imagewise exposing the coated substrate, and (5) contacting the support with a physical developer comprising a solution of metal ions and a reducing agent for these metal ions to selectively deposit the metal in exposed portions of the photosensitive layer.
Claim 20
Dependent Claim
33 words
Process as in claim 13 wherein the step of contacting with the physical developer is prolonged for a time period sufficient to form a metal image suitable for use as a printing plate.
Claim 21
Dependent Claim
18 words
Process as in claim 14 wherein the thickness of the photosensitive layer is less than about 0.5 micron.
Claim 22
Dependent Claim
34 words
Process as in claim 14 wherein the silver halide has a particle size of less than about 500 A and wherein the silver halide is silver chloride having an excess of halide ion present.
Claim 23
Dependent Claim
25 words
Process as in claim 15 wherein the silver halide is present in an amount of about 0.03 g/m2 based upon the weight of silver present.
Claim 24
Dependent Claim
25 words
Process as in claim 13 additionally comprising the step of chemically developing the exposed substrate prior to the step of contacting with a physical developer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |