US3142565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic products, processes and compositions employing azo dye developers
Assignee: Polaroid Corp
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Filing: 1962-09-10
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Granted: 1964-07-28
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Expires: 1982-09-10
Abstract
No abstract record available.
Inventors
- 👤 Elkan R Blout
- 👤 Howard G Rogers
- 👤 Myron S Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:07
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10; G03C8/12; G03C8/14; G03C8/16; G03C8/18; C; C09; C09B; C09B31/00; C09B33/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
IN A PROCESS OF FORMING A PHOTOGRAPHIC IMAGE IN COLOR, THE STEPS WHICH COMPRISE DEVELOPING A LATENT IMAGE CONTAINED IN AN EXPOSED SILVER HALIDE EMULSION BY CONTACTING SAID EMULSION WITH AN AQUEOUS ALKALINE SOLUTION CONTAINING A COLORLESS SILVER HALIDE AUXILIARY DEVELOPING AGENT AND AN AZO DYE DEVELOPER OF THE FORMULA:
Claim 2
Dependent Claim
50 words
IN A PROCESS OF FORMING A PHOTOGRAPHIC IMAGE IN COLOR, THE STEPS WHICH COMPRISE DEVELOPING A LATENT IMAGE CONTAINED IN AN EXPOSED SILVER HALIDE EMULSION BY CONTACTING SAID EMULSION WITH AN AQUEOUS ALKALINE SOLUTION CONTAINING A COLORLESS SILVER HALIDE AUXILIARY DEVELOPING AGENT AND AN AZO DYE DEVELOPER OF THE FORMULA:
References Cited (Backward Citations)
BE554212A
Cited
US2983606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |