US3836369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazo photosensitive composition
Assignee: EIDP Inc
•
Filing: 1972-09-05
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Granted: 1974-09-17
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Expires: 1992-09-05
Abstract
Abstract Acid-stabilized, light sensitive azo dye-forming compositions comprising a mixture of at least one light sensitive diazonium salts from each of a fast group and a slow group and a mixture of coupler components from each of two groups. These compositions are capable of producing low-contrast images over a wide latitude and are especially useful for electronic video recording systems.
Inventors
- 👤 C Looney
- 👤 R Michel
- 👤 R Sahatjian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:59
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/58
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
The composition as defined in claim 1 wherein the mole ratio of Group 1 to Group 2 diazonium salts ranges from 3:2 to 1:2.
Claim 2
Dependent Claim
24 words
a mixture of a. diresorcinol sulfide and b. monohydroxyethylether of resorcinol, wherein the ratio of (a) to (b) ranges from about 1:15 to 1:5.
Claim 3
Dependent Claim
30 words
4-(diethylamino)-2-methyl benzene diazonium salt; and B. a mixture of coupler components (1) and (2) wherein the ratio of (1) to (2) ranges from about 1:2 and 1:6, said components being:
Claim 4
Dependent Claim
23 words
The composition as defined in claim 1 wherein the mole ratio of Group 1 to Group 2 couplers ranges from 1:3 to 1:5.
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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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |