US3846129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dye diffusion transfer compositions,elements and processes
Assignee: Eastman Kodak Co
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Filing: 1972-09-25
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Granted: 1974-11-05
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Expires: 1992-09-25
Abstract
Abstract 1. A COLOR DEVELOPING COMPOSITION COMPRISING AN AQUE OUS ALKALINE SOLUTION OF (1) A PHENYLENEDIAMINE COLOR DEVELOPING AGENT, (2) A COMPETING BLACK AND WHITE DEWELOPING AGENT, (3) A XYLENEDIOL, AND (4) A THICKENING AGENT TO IMPART A VISCOSITY OF ABOUT 100 TO 2000,000 CPS. TO SAID COMPOSITION.
Inventors
- 👤 A Kuh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:31
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/32; G03C8/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A COLOR DEVELOPING COMPOSITION COMPRISING AN AQUE OUS ALKALINE SOLUTION OF (1) A PHENYLENEDIAMINE COLOR DEVELOPING AGENT, (2) A COMPETING BLACK AND WHITE DEWELOPING AGENT, (3) A XYLENEDIOL, AND (4) A THICKENING AGENT TO IMPART A VISCOSITY OF ABOUT 100 TO 2000,000 CPS. TO SAID COMPOSITION.
Claim 2
Dependent Claim
46 words
A COLOR DEVELOPING COMPOSITION COMPRISING AN AQUE OUS ALKALINE SOLUTION OF (1) A PHENYLENEDIAMINE COLOR DEVELOPING AGENT, (2) A COMPETING BLACK AND WHITE DEWELOPING AGENT, (3) A XYLENEDIOL, AND (4) A THICKENING AGENT TO IMPART A VISCOSITY OF ABOUT 100 TO 2000,000 CPS. TO SAID COMPOSITION.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |