Patent US3142564A successfully refreshed from Google Patents.
US3142564A
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Photographic products, processes and compositins utilizing acyl hydroquinones
Assignee: Polaroid Corp
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Filing: 1962-01-08
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Granted: 1964-07-28
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Expires: 1982-01-08
Abstract
No abstract record available.
Inventors
- 👤 Elkan R Blout
- 👤 Myron S Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:06
CPC Classifications
C; C07; C07K; C07K5/00; C07K5/04; C07K5/08; C07K5/0802; C07K5/0804; C07K5/0806; C07K1/00; C07K1/06; C07K1/08; C07K1/086; C07K1/12; C07K1/122; C07K5/06; C07K5/06008; C07K5/06017; C07K5/06034; C07K5/06052; C07K5/0606; C07K5/06086; G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/3021; G03C8/00; G03C8/02; G03C8/08; G03C8/10; G03C8/12; G03C8/14; G03C8/16; G03C8/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
43 words
IN A PHOTOGRAPHIC PROCESS, THE STEPS WHICH COMPRISE DEVELOPING AN EXPOSED SILVER HALIDE EMULSION WITH AN AQUEOUS SOLUTION COMPRISING AN ALKALINE MATERIAL SOLUBLE THEREIN, AN ACCELERATING SILVER HALIDE DEVELOPING AGENT, A SILVER HALIDE SOLVENT AND A SILVER HALIDE DEVELOPING AGENT OF THE FORMULA:
References Cited (Backward Citations)
US3019107A
Cited
US3009958A
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 |