US3615563A
Expired / Lapsed
US
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Dye cyanides photoactivated by inorganic salts
Assignee: Individual
•
Filing: 1969-01-21
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Granted: 1971-10-26
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Expires: 1989-01-21
Abstract
Abstract Dye cyanides are photoactivated by salts of metals of groups 1B and 2B of the periodic table of the elements. Systems are disclosed in which a solution of a dye cyanide in a nonphotoactivating solvent are made photoresponsive by the addition of a salt of a metal of group 1B or 2B. Also photographic sheet materials are described in which the incorporation of a salt of a metal of group 1B or 2B prevents the evolution of hydrogen cyanide during and after the photolysis of the dye cyanide sensitizer.
Inventors
- 👤 Lyman Chalkley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:12
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/732
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
22 words
The photosensitive composition of claim 1 wherein the metal is selected from the group consisting of copper, silver, zinc, cadmium and mercury.
Claim 2
Dependent Claim
14 words
A photosensitive element comprising a supporting sheet coated with the composition of claim 1.
Claim 3
Dependent Claim
22 words
The photosensitive element of claim 3 wherein the metal is selected from the group consisting of copper, silver, zinc, cadmium and mercury.
Claim 4
Dependent Claim
18 words
The photosensitive element of claim 4 wherein the metallic salt is the cupric salt of a carboxylic acid.
Claim 5
Dependent Claim
13 words
The photosensitive element of claim 5 wherein the metallic salt is cupric acetate.
Claim 6
Dependent Claim
22 words
A photosensitive solution comprising the photosensitive composition of claim 1 dissolved in a common solvent for the metallic salt and dye cyanide.
Claim 7
Dependent Claim
16 words
The photosensitive solution of claim 7 wherein the common solvent is a polymeric film forming material.
Claim 8
Dependent Claim
28 words
The photosensitive solution of claim 7 wherein the common solvent is selected from the group consisting of cellulose acetate, cellulose butyrate, cellulose butyrate acetate and polymerized methacrylic ester.
Claim 9
Dependent Claim
21 words
A photochemical process comprising the irradiation of the composition of claim 1 with ultraviolet radiation until a visible color is formed.
Claim 10
Dependent Claim
21 words
A photochemical process comprising the irradiation of the composition of claim 3 with ultraviolet radiation until a visible color is formed.
Claim 11
Dependent Claim
21 words
A photochemical process comprising the irradiation of the composition of claim 7 with ultraviolet radiation until a visible color is formed.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |