Patent US3343958A successfully refreshed from Google Patents.
US3343958A
Expired / Lapsed
US
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Monobath containing cysteine-nitrogenous base combination
Assignee: Polaroid Corp
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Filing: 1965-04-09
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Granted: 1967-09-26
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Expires: 1985-04-09
Abstract
No abstract record available.
Inventors
- 👤 Meroe M Morse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:48
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/38; G03C5/383
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
64 words
A PHOTOGRAPHIC PROCESS FOR DEVELOPING AND FIXING AN EXPOSED SILVER HALIDE EMULSION TO FORM A NEGATIVE IMAGE THEREON, WHICH COMPRISES CONTACTING SAID EXPOSED EMULSION WITH AN AQUEOUS PROCESSING COMPOSITION CONTAINING A SILVER HALIDE DEVELOPING AGENT AND A MIXTURE OF CYSTEINE AND A NITROGENOUS BASE, REDUCING EXPOSED SILVER HALIDE TO IMAGE SILVER AND FORMING A TRANSPARENT, SILVER COMPLEX FROM UNEXPOSED SILVER HALIDE WITH SAID MIXTURE.
Claim 2
Dependent Claim
64 words
A PHOTOGRAPHIC PROCESS FOR DEVELOPING AND FIXING AN EXPOSED SILVER HALIDE EMULSION TO FORM A NEGATIVE IMAGE THEREON, WHICH COMPRISES CONTACTING SAID EXPOSED EMULSION WITH AN AQUEOUS PROCESSING COMPOSITION CONTAINING A SILVER HALIDE DEVELOPING AGENT AND A MIXTURE OF CYSTEINE AND A NITROGENOUS BASE, REDUCING EXPOSED SILVER HALIDE TO IMAGE SILVER AND FORMING A TRANSPARENT, SILVER COMPLEX FROM UNEXPOSED SILVER HALIDE WITH SAID MIXTURE.
Claim 3
Dependent Claim
35 words
A PHOTOGRAPHIC PROCESS AS DEFINED IN CLAIM 11 INCLUDING THE STEPS OF TRANSFERRING AN IMAGEWISE DISTRIBUTION OF SAID SILVER COMPLEX, AT LEAST IN PART, TO A SUPERPOSED IMAGE-RECEIVING STRATUM TO FORM A SILVER TRANSFER IMAGE.
References Cited (Backward Citations)
US2857274A
Cited
US2984565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |