US3773512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photothermic material containing a light-insensitive silver salt and an indane-1,3-dione reducing agent
Assignee: Agfa Gevaert NV
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Filing: 1971-11-17
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Granted: 1973-11-20
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Expires: 1991-11-17
Abstract
Abstract Photographic recording material with a light-sensitive layer comprising a substantially light-insensitive silver salt, an indane-1,3-dione compound acting as reducing agent and a lightsensitive heavy metal compound which upon exposure to activating electromagnetic radiation forms metal nuclei that upon heating of the material initiate a redox reaction between the lightinsensitive silver salt and the reducing agent. A preferred recording material for print-out reproduction contains silver behenate, 2-phenylindane-1,3-dione and traces of silver halide.
Inventors
- 👤 A Poot
- 👤 Besauw J Van
- 👤 F Heugebaert
- 👤 E Brinckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:12
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49827
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
20 words
Photographic recording material according to claim 1 characterized in that silver halide is used as said light-sensitive heavy metal salt.
Claim 2
Dependent Claim
31 words
Photographic recording material according to claim 1 characterized in that the heavy metal salt is used in amounts ranging between 0.05 and 0.2 percent by weight of the light-insensitive silver salt.
Claim 3
Dependent Claim
26 words
Photographic recording material according to claim 1 characterized in that a silver salt of a long-chain silver fatty acid is used as said light-insensitive silver salt.
Claim 4
Dependent Claim
19 words
Photographic recording material according to claim 1 characterized in that silver behenate is used as said light-insensitive silver salt.
Claim 5
Dependent Claim
21 words
Photographic recording material according to claim 1 characterized in that the material contains a polymethine dye as a spectral sensitizing agent.
Claim 6
Dependent Claim
18 words
Photographic recording material according to claim 1 characterized in that the material contains phthalazione as a toning agent.
Claim 7
Independent Claim
75 words
A method of recording information-wise modulated electromagnetic radiation comprising the steps of: (1) imagewise exposing a photosensitive material containing a substantially light-insensitive silver salt of an organic acid and a photosensitive salt of gold, mercury or silver to electromagnetic radiation to photolytically release metal nuclei from said latter salt, and (2) heating the exposed photosensitive sheet while having said substantially light-insensitive silver salt in effective contact with an indane-1,3-dione reducing agent of the general formula:
Claim 8
Dependent Claim
13 words
The method of claim 8 wherein said light-sensitive salt is a silve halide.
Claim 9
Dependent Claim
15 words
The method of claim 8 wherein said light-insensitive salt is of a long-chain fatty acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |