Patent US2933388A successfully refreshed from Google Patents.
US2933388A
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Tetrazaindene compounds and photographic application
Assignee: Eastman Kodak Co
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Filing: 1957-10-03
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Granted: 1960-04-19
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Expires: 1977-10-03
Abstract
No abstract record available.
Inventors
- 👤 Edward B Knott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:17
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
46 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 OF A COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Independent Claim
46 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 OF A COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 3
Independent Claim
46 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 OF A COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 4
Independent Claim
46 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 OF A COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
CA455518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |