Patent US5343311A successfully refreshed from Google Patents.
US2657136A
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Photographic antiplumming agents and compositions containing them
Assignee: Eastman Kodak Co
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Filing: 1951-10-25
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Granted: 1953-10-27
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Expires: 1971-10-25
Abstract
No abstract record available.
Inventors
- 👤 Edward B Knott
- 👤 Philip K Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:50
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/60; C07D277/62; C07D277/68; C07D277/82; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/35; G03C1/355; Y; Y10; Y10S; Y10S430/00; Y10S430/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE METHOD OF PREVENTING IMAGE DEGRADATION OF AN EXPOSED SILVER HALIDE EMULSION DURING PROCESSING, WHICH COMPRISES PERFORMING AT LEAST ONE OF THE STEPS OF DEVELOPING, FIXING, WASHING AND DRYING SAID EMULSION IN THE PRESENCE IN SAID EMULSION OF FROM 2.5 GRAMS TO 25 GRAMS PER UNIT OF SILVER HALIDE FORMED FROM 1000 GRAMS OF SILVER NITRATE, OF A COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Independent Claim
68 words
THE METHOD OF PREVENTING IMAGE DEGRADATION OF AN EXPOSED SILVER HALIDE EMULSION DURING PROCESSING, WHICH COMPRISES PERFORMING AT LEAST ONE OF THE STEPS OF DEVELOPING, FIXING, WASHING AND DRYING SAID EMULSION IN THE PRESENCE IN SAID EMULSION OF FROM 2.5 GRAMS TO 25 GRAMS PER UNIT OF SILVER HALIDE FORMED FROM 1000 GRAMS OF SILVER NITRATE, OF A COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |