Patent US5837042A successfully refreshed from Google Patents.
US5837042A
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US
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Invisible fluorescent jet ink
Assignee: Videojet Technologies Inc
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Filing: 1996-06-10
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Granted: 1998-11-17
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Expires: 2016-06-10
Abstract
Abstract The present invention provides jet ink compositions suitable for producing security markings on documents and other articles for subsequent identification. The jet ink composition comprises a fluorescent colorant, an ink carrier, and optionally one or more binder resins. The markings are invisible to the unaided eye and are visible only when excited by ultraviolet light. The colorant comprises a rare earth metal and a chelating ligand, is excitable by ultraviolet light having a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 550 nm to about 700 nm, with the proviso that when the rare earth metal is europium, dysprosium, or terbium, the chelating ligand is not dibenzoylmethane. The present invention further provides a method of identifying objects comprising providing a security marking as described above, exciting the marking and reading the fluorescent emission. The present invention also provides a system for identification of objects bearing the security markings.
Inventors
- 👤 Bruce A. Lent
- 👤 Godwin Deng
- 👤 Jose F. Ezpeleta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:10
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/50; B; B41; B41M; B41M3/00; B41M3/14; B41M3/144; C09D11/30; C09D11/36; G; G06; G06K; G06K19/00; G06K19/06; G06K19/06009; G06K19/06046; G06K7/00; G06K7/10; G06K7/12
Claims Analysis
Total Claims: 77
Claim 1
Independent Claim
147 words
A jet ink composition suitable for providing a mark on white or light colored substrates, wherein said composition comprises a colorant and an ink carrier and has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, wherein said mark is completely or substantially invisible to the unaided eye and is visible only when excited by ultraviolet light, and said colorant comprises a rare earth metal and a chelating ligand, absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, with the proviso that when the rare earth metal is europium, dysprosium, or terbium, the chelating ligand is not dibenzoylmethane.
Claim 2
Dependent Claim
147 words
A jet ink composition suitable for providing a mark on white or light colored substrates, wherein said composition comprises a colorant and an ink carrier and has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, wherein said mark is completely or substantially invisible to the unaided eye and is visible only when excited by ultraviolet light, and said colorant comprises a rare earth metal and a chelating ligand, absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, with the proviso that when the rare earth metal is europium, dysprosium, or terbium, the chelating ligand is not dibenzoylmethane.
Claim 3
Dependent Claim
17 words
The jet ink composition of claim 1, wherein said chelating ligand is a biketonate, acetonate, or salicylate.
Claim 4
Dependent Claim
24 words
The jet ink composition of claim 2, wherein said chelating ligand is selected from the group consisting of acetylacetone, benzoylacetone, dibenzoylmethane, and salicylic acid.
Claim 5
Dependent Claim
13 words
The jet ink composition of claim 3, wherein said chelating ligand is acetylacetone.
Claim 6
Dependent Claim
26 words
The jet ink composition of claim 4, wherein said rare earth metal is selected from the group consisting of neodymium, europium, samarium, terbium, dysprosium, and terbium.
Claim 7
Dependent Claim
28 words
The jet ink composition of claim 5, wherein said colorant is selected from the group consisting of europium acetylacetonate, samarium acetylacetonate, neodymium benzoylacetonate, terbium salicylate, and dysprosium benzoylacetonate.
Claim 8
Dependent Claim
13 words
The jet ink composition of claim 6, wherein said colorant is europium acetylacetonate.
Claim 9
Dependent Claim
14 words
The jet ink composition of claim 7, further comprising one or more binder resins.
Claim 10
Dependent Claim
25 words
The jet ink composition of claim 8, wherein said binder resin is selected from the group consisting of polyurethane, polyvinylpyrrolidone, styrene-acrylic copolymer, nitrocellulose, and ethylcellulose.
Claim 11
Dependent Claim
15 words
The jet ink composition of claim 9, wherein said ink carrier comprises an organic solvent.
Claim 12
Dependent Claim
14 words
The jet ink composition of claim 10, wherein said organic solvent comprises an alcohol.
Claim 13
Dependent Claim
11 words
The jet ink composition of claim 11, further comprising an electrolyte.
Claim 14
Dependent Claim
13 words
The jet ink composition of claim 12, wherein said electrolyte comprises lithium nitrate.
Claim 15
Dependent Claim
107 words
The jet ink composition of claim 13, wherein said alcohol is ethanol and is present in an amount of from about 80% by weight to about 97% by weight of said ink composition, said colorant is a lanthanide chelate and is present in an amount of from about 0.1% by weight to about 2%. by weight of said ink composition, said binder resin is present in an amount of from about 1% by weight to about 15% by weight of said ink composition, and said lithium nitrate is present in an amount of from about 0.4% by weight to about 0.6% by weight of said ink composition.
Claim 16
Dependent Claim
150 words
A jet ink composition suitable for printing a mark on white or light colored substrates, wherein said composition comprises a colorant, an ink carrier, and one or more binder resins and has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, wherein said mark is completely or substantially invisible to the unaided eye and is visible only when excited by ultraviolet light, and said colorant comprises a rare earth metal and a chelating ligand, absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, with the proviso that when the chelating ligand is dibenzoylmethane, the binder resin is not ethylcellulose or polyvinylbutyral.
Claim 17
Dependent Claim
150 words
A jet ink composition suitable for printing a mark on white or light colored substrates, wherein said composition comprises a colorant, an ink carrier, and one or more binder resins and has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, wherein said mark is completely or substantially invisible to the unaided eye and is visible only when excited by ultraviolet light, and said colorant comprises a rare earth metal and a chelating ligand, absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, with the proviso that when the chelating ligand is dibenzoylmethane, the binder resin is not ethylcellulose or polyvinylbutyral.
Claim 18
Dependent Claim
17 words
The jet ink composition of claim 15, wherein said chelating ligand is a biketonate, acetonate, or salicylate.
Claim 19
Dependent Claim
24 words
The jet ink composition of claim 16, wherein aid chelating ligand is selected from the group consisting of acetylacetone, benzoylacetone, dibenzoylmethane, and salicylic acid.
Claim 20
Dependent Claim
13 words
The jet ink composition of claim 17, wherein aid chelating ligand is acetylacetone.
Claim 21
Dependent Claim
13 words
The jet ink composition of claim 18, wherein said colorant is europium acetylacetonate.
Claim 22
Dependent Claim
15 words
The jet ink composition of claim 19, wherein said ink carrier comprises an organic solvent.
Claim 23
Dependent Claim
14 words
The jet ink composition of claim 20, wherein said organic solvent comprises an alcohol.
Claim 24
Dependent Claim
11 words
The jet ink composition of claim 21, further comprising an electrolyte.
Claim 25
Dependent Claim
13 words
The jet ink composition of claim 22, wherein said electrolyte comprises lithium nitrate.
Claim 26
Dependent Claim
25 words
The jet ink composition of claim 23, wherein said binder resin is selected from the group consisting of polyurethane, polyvinylpyrrolidone, styrene-acrylic copolymer, nitrocellulose, and ethylcellulose.
Claim 27
Dependent Claim
18 words
The jet ink composition of claim 24, wherein said ink composition comprises polyvinylpyrrolidone and polyurethane as binder resins.
Claim 28
Dependent Claim
122 words
The jet ink composition of claim 25, wherein said alcohol is ethanol and is present in an amount of from about 80% by weight to about 97% by weight of said ink composition, said colorant is a lanthanide chelate and is present in an amount of from about 0.1% by weight to about 2% by weight of said ink composition, said polyvinylpyrrolidone in an amount of from about 1% by weight to about 2% by weight of said ink composition, said polyurethane in an amount of from about 5% by weight to about 13% by weight of said ink composition, and said lithium nitrate in an amount of from about 0.4% by weight to about 0.6% by weight of said ink composition.
Claim 29
Independent Claim
162 words
A system for marking items with a mark for subsequent identification comprising a printing means for printing said mark on said items, wherein said printing means employs an ink composition, wherein said composition comprises a colorant and an ink carrier and has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, wherein said mark is completely or substantially invisible to the unaided eye and is visible only when excited by ultraviolet light, and said colorant comprises a rare earth metal and a chelating ligand, absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, with the proviso that when the rare earth metal is europium, dysprosium, and terbium, the chelating ligand is not dibenzoylmethane.
Claim 30
Independent Claim
162 words
A system for marking items with a mark for subsequent identification comprising a printing means for printing said mark on said items, wherein said printing means employs an ink composition, wherein said composition comprises a colorant and an ink carrier and has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, wherein said mark is completely or substantially invisible to the unaided eye and is visible only when excited by ultraviolet light, and said colorant comprises a rare earth metal and a chelating ligand, absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, with the proviso that when the rare earth metal is europium, dysprosium, and terbium, the chelating ligand is not dibenzoylmethane.
Claim 31
Dependent Claim
13 words
The system of claim 27, wherein said printing means comprises a jet printer.
Claim 32
Dependent Claim
13 words
The system of claim 28, wherein said rare earth metal comprises a lanthanide.
Claim 33
Dependent Claim
12 words
The system of claim 29, wherein said chelating ligand is a biketonate.
Claim 34
Dependent Claim
12 words
The system of claim 30, wherein said colorant is an europium biketonate.
Claim 35
Dependent Claim
16 words
The system of claim 31, wherein said ink composition further comprises one or more binder resins.
Claim 36
Independent Claim
168 words
A system for identifying items with a security mark said system comprising an excitation means for exciting said mark and a fluorescence detecting means for detecting the fluorescent emission of said mark, wherein said mark comprises an ink composition, wherein said composition comprises a colorant and an ink carrier, has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, is completely or substantially invisible to the unaided eye, and is visible only when excited by ultraviolet light, and wherein said colorant comprises a rare earth metal and a chelating ligand, absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, with the proviso that when the rare earth metal is europium, dysprosium, and terbium, the chelating ligand is not dibenzoylmethane.
Claim 37
Independent Claim
168 words
A system for identifying items with a security mark said system comprising an excitation means for exciting said mark and a fluorescence detecting means for detecting the fluorescent emission of said mark, wherein said mark comprises an ink composition, wherein said composition comprises a colorant and an ink carrier, has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, is completely or substantially invisible to the unaided eye, and is visible only when excited by ultraviolet light, and wherein said colorant comprises a rare earth metal and a chelating ligand, absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, with the proviso that when the rare earth metal is europium, dysprosium, and terbium, the chelating ligand is not dibenzoylmethane.
Claim 38
Independent Claim
169 words
A method of providing a mark on a substrate for subsequent identification comprising applying onto said substrate an ink composition, wherein said composition comprises a colorant and an ink carrier and has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, wherein said mark is completely or substantially invisible to the unaided eye and is visible only when excited by ultraviolet light, and said colorant comprises a rare earth metal and a chelating ligand, absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, and removing all or substantially all of said ink carrier by evaporation or absorption into said substrate, with the proviso that when the rare earth metal is europium, dysprosium, or terbium, the chelating ligand is not dibenzoylmethane.
Claim 39
Independent Claim
169 words
A method of providing a mark on a substrate for subsequent identification comprising applying onto said substrate an ink composition, wherein said composition comprises a colorant and an ink carrier and has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, wherein said mark is completely or substantially invisible to the unaided eye and is visible only when excited by ultraviolet light, and said colorant comprises a rare earth metal and a chelating ligand, absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, and removing all or substantially all of said ink carrier by evaporation or absorption into said substrate, with the proviso that when the rare earth metal is europium, dysprosium, or terbium, the chelating ligand is not dibenzoylmethane.
Claim 40
Dependent Claim
18 words
The method of claim 34, wherein said ink composition is applied to said substrate using a jet printer.
Claim 41
Dependent Claim
13 words
The method of claim 35, wherein said rare earth metal comprises a lanthanide.
Claim 42
Dependent Claim
14 words
The method of claim 36, wherein said chelating ligand is a biketonate or acetonate.
Claim 43
Dependent Claim
11 words
The method of claim 37, wherein said colorant is europium acetylacetonate.
Claim 44
Dependent Claim
13 words
The method of claim 38, wherein said ink carrier comprises an organic solvent.
Claim 45
Dependent Claim
12 words
The method of claim 39, wherein said organic solvent comprises an alcohol.
Claim 46
Dependent Claim
13 words
The method of claim 40, wherein said ink composition further comprises an electrolyte.
Claim 47
Dependent Claim
16 words
The method of claim 41, wherein said ink composition further comprises one or more binder resins.
Claim 48
Dependent Claim
22 words
The method of claim 42, wherein said binder resin is selected from the group consisting of polyurethane, polyvinylpyrrolidone, styrene-acrylic, nitrocellulose, and ethylcellulose.
Claim 49
Dependent Claim
15 words
The method of claim 42, wherein said composition comprises polyurethane and polyvinylpyrrolidone as binder resins.
Claim 50
Dependent Claim
27 words
The method of claim 34, wherein said substrate is selected from the group consisting of envelopes, checks, bank bills, shares, securities, identity cards, passports, tickets, and certificates.
Claim 51
Dependent Claim
151 words
A mark provided on a substrate for subsequent identification wherein said mark is completely or substantially invisible to the unaided eve, is visible only when excited by ultraviolet light, and absorbs light at a wavelength of from about 275 nm to about 400 nm, and fluoresces light at a wavelength of from about 575 nm to about 700 nm, wherein said mark is provided by an ink composition, wherein said composition comprises a colorant and an ink carrier and has a viscosity of from about 1.8 cps to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, wherein said colorant comprises a rare earth metal and a chelating ligand, with the proviso that when the rare earth metal is europium, dysprosium, or terbium, the chelating ligand is not dibenzoylmethane.
Claim 52
Dependent Claim
151 words
A mark provided on a substrate for subsequent identification wherein said mark is completely or substantially invisible to the unaided eve, is visible only when excited by ultraviolet light, and absorbs light at a wavelength of from about 275 nm to about 400 nm, and fluoresces light at a wavelength of from about 575 nm to about 700 nm, wherein said mark is provided by an ink composition, wherein said composition comprises a colorant and an ink carrier and has a viscosity of from about 1.8 cps to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, wherein said colorant comprises a rare earth metal and a chelating ligand, with the proviso that when the rare earth metal is europium, dysprosium, or terbium, the chelating ligand is not dibenzoylmethane.
Claim 53
Dependent Claim
46 words
The mark of claim 46, wherein said colorant is europium acetylacetonate, said ink carrier comprises an alcohol solvent, said ink composition further comprises an electrolyte and a binder resin, and said binder resin is selected from the group consisting of polyurethane, polyvinylpyrrolidone, styrene-acrylic, nitrocellulose, and ethylcellulose.
Claim 54
Dependent Claim
41 words
The mark of claim 47, wherein said binder resin is selected from the group consisting of polyurethane and polyvinylpyrrolidone, and said substrate is selected from the group consisting of envelopes, checks, bank bills, shares, securities, identity cards, passports, tickets, and certificates.
Claim 55
Independent Claim
212 words
A method of identifying objects comprising the steps of (a) applying identifying markings to said objects using a jet ink composition, wherein said composition comprises a colorant and an ink carrier, has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, wherein said mark is completely or substantially invisible to the unaided eye and is visible only when excited by ultraviolet light, and said colorant comprises a rare earth metal and a chelating ligand, absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, and removing all or substantially all of said ink carrier by evaporation or absorption into said substrate, with the proviso that when the rare earth metal is europium, dysprosium, or terbium, the chelating ligand is not dibenzoylmethane; (b) subjecting said objects to exciting radiation having a wavelength of from about 275 nm to about 400 nm; (c) reading said markings by detecting fluorescent radiation from said markings; and (d) identifying said objects in response to the reading of said markings.
Claim 56
Independent Claim
212 words
A method of identifying objects comprising the steps of (a) applying identifying markings to said objects using a jet ink composition, wherein said composition comprises a colorant and an ink carrier, has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, wherein said mark is completely or substantially invisible to the unaided eye and is visible only when excited by ultraviolet light, and said colorant comprises a rare earth metal and a chelating ligand, absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, and removing all or substantially all of said ink carrier by evaporation or absorption into said substrate, with the proviso that when the rare earth metal is europium, dysprosium, or terbium, the chelating ligand is not dibenzoylmethane; (b) subjecting said objects to exciting radiation having a wavelength of from about 275 nm to about 400 nm; (c) reading said markings by detecting fluorescent radiation from said markings; and (d) identifying said objects in response to the reading of said markings.
Claim 57
Dependent Claim
14 words
The method of claim 49, wherein said chelating ligand comprises a biketonate or acetonate.
Claim 58
Dependent Claim
15 words
The method of claim 50, wherein said colorant is a lanthanide chelate comprising europium acetylacetonate.
Claim 59
Dependent Claim
16 words
The method of claim 51, wherein said ink composition further comprises one or more binder resins.
Claim 60
Dependent Claim
22 words
The method of claim 52, wherein said binder resin is selected from the group consisting of polyurethane, polyvinylpyrrolidone, styrene-acrylic, nitrocellulose, and ethylcellulose.
Claim 61
Dependent Claim
27 words
The method of claim 53, wherein said object is selected from the group consisting of envelopes, checks, bank bills, shares, securities, identity cards, passports, tickets, and certificates.
Claim 62
Dependent Claim
145 words
A substrate having identifying markings produced by jet printing onto said substrate an ink composition, wherein said composition comprises a colorant and an ink carrier and has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, wherein said markings are substantially invisible to the unaided eye and are visible only when excited by ultraviolet light, and said colorant comprises a rare earth metal and a chelating ligand, absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, with the proviso that when the rare earth metal is europium, dysprosium, or terbium, the chelating ligand is not dibenzoylmethane.
Claim 63
Dependent Claim
145 words
A substrate having identifying markings produced by jet printing onto said substrate an ink composition, wherein said composition comprises a colorant and an ink carrier and has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, wherein said markings are substantially invisible to the unaided eye and are visible only when excited by ultraviolet light, and said colorant comprises a rare earth metal and a chelating ligand, absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, with the proviso that when the rare earth metal is europium, dysprosium, or terbium, the chelating ligand is not dibenzoylmethane.
Claim 64
Dependent Claim
14 words
The substrate of claim 55, wherein said chelating ligand comprises a biketonate or acetonate.
Claim 65
Dependent Claim
15 words
The substrate of claim 56, wherein said colorant is a lanthanide chelate comprising europium acetylacetonate.
Claim 66
Dependent Claim
16 words
The substrate of claim 57, wherein said ink composition further comprises one or more binder resins.
Claim 67
Dependent Claim
22 words
The substrate of claim 58, wherein said binder resin is selected from the group consisting of polyvinylpyrrolidone, polyurethane, styrene-acrylic, nitrocellulose, and ethylcellulose.
Claim 68
Dependent Claim
27 words
The substrate of claim 59, wherein said substrate is selected from the group consisting of envelopes, checks, bank bills, shares, securities, identity cards, passports, tickets, and certificates.
Claim 69
Dependent Claim
130 words
A jet ink composition suitable for marking on white or light colored substrates, wherein said composition comprises a colorant and an ink carrier and has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, wherein said mark is completely or substantially invisible to the unaided eye and is visible only when excited by ultraviolet light, and said colorant absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, with the proviso that the colorant does not include dysprosium, europium, or terbium dibenzoylmethide.
Claim 70
Dependent Claim
130 words
A jet ink composition suitable for marking on white or light colored substrates, wherein said composition comprises a colorant and an ink carrier and has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, wherein said mark is completely or substantially invisible to the unaided eye and is visible only when excited by ultraviolet light, and said colorant absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, with the proviso that the colorant does not include dysprosium, europium, or terbium dibenzoylmethide.
Claim 71
Dependent Claim
154 words
A jet ink composition suitable for marking on white or light colored substrates comprising a colorant, an ink carrier, a polyurethane resin and at least one other resin wherein said jet ink composition has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, and said mark is completely or substantially invisible to the unaided eye and is visible only when excited by ultraviolet light, and said colorant comprises a rare earth metal and a chelating ligand, absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, with the proviso that when the rare earth metal is europium, dysprosium, or terbium, the chelating ligand is not dibenzoylmethane.
Claim 72
Dependent Claim
154 words
A jet ink composition suitable for marking on white or light colored substrates comprising a colorant, an ink carrier, a polyurethane resin and at least one other resin wherein said jet ink composition has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2,000 ohm-cm, and a sonic velocity of from about 1200 meters/second to about 1700 meters/second, and said mark is completely or substantially invisible to the unaided eye and is visible only when excited by ultraviolet light, and said colorant comprises a rare earth metal and a chelating ligand, absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, with the proviso that when the rare earth metal is europium, dysprosium, or terbium, the chelating ligand is not dibenzoylmethane.
Claim 73
Dependent Claim
17 words
The jet ink composition of claim 62, wherein said chelating ligand is a biketonate, acetonate, or salicyate.
Claim 74
Dependent Claim
24 words
The jet ink composition of claim 63, wherein said chelating ligand is selected from the group consisting of acetylacetone, benzoylacetone, dibenzoylmethane, and salicylic acid.
Claim 75
Dependent Claim
24 words
The jet ink composition of claim 62, wherein said other resin is selected from the group consisting of polyvinylpyrrolidone, styrene-acrylic copolymer, nitrocellulose, and ethylcellulose.
Claim 76
Dependent Claim
146 words
A jet ink composition suitable for marking on white a light colored substrate wherein said composition comprises a colorant, an ink carrier, a polyurethane resin and at least one other resin, and has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2000 ohm cm, and a sonic velocity of from about 1200 meter/second to about 1700 meters/second, and wherein said mark is completely or substantially invisible to the unaided eye and is visible only when excited by ultraviolet light, and said colorant absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, with the proviso that when the rare earth metal is europium, dysprosium, or terbium, the chelating ligand is not dibenzoylmethane.
Claim 77
Dependent Claim
146 words
A jet ink composition suitable for marking on white a light colored substrate wherein said composition comprises a colorant, an ink carrier, a polyurethane resin and at least one other resin, and has a viscosity of from about 1.8 centipoises (cps) to about 6 cps at 25° C., an electrical resistivity of from about 20 ohm-cm to about 2000 ohm cm, and a sonic velocity of from about 1200 meter/second to about 1700 meters/second, and wherein said mark is completely or substantially invisible to the unaided eye and is visible only when excited by ultraviolet light, and said colorant absorbs at a wavelength of from about 275 nm to about 400 nm, and fluoresces at a wavelength of from about 575 nm to about 700 nm, with the proviso that when the rare earth metal is europium, dysprosium, or terbium, the chelating ligand is not dibenzoylmethane.
References Cited (Backward Citations)
JPS53140105A
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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) | 2001-11-16 | 2002-05-18 | 2002-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-16 | 2006-05-18 | 2006-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-16 | 2010-05-18 | 2010-11-17 | $7700.00 | Window Closed / Lapsed |