US2875048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined photographic developing and stabilizing solution
Assignee: Eastman Kodak Co
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Filing: 1957-09-30
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Granted: 1959-02-24
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Expires: 1977-09-30
Abstract
No abstract record available.
Inventors
- 👤 Grant M Haist
- 👤 James R King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:26
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/38; G03C5/383
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR PRODUCING A STABLE PHOTOGRAPHIC SILVER IMAGE WHICH COMPRISES TREATING AN EXPOSED SILVER HALIDE EMULSION LAYER WITH AN ALKALINE SOLUTION CONTAIN ING (1) A COMPOUND OF THE CLASS CONSISTING OF HYDROXYLAMINE AND A 3-PYRAZOLIDONE SILVER HALIDE DEVELOPING AGENT, AND (2) A COMPOUND OF THE CLASS CONSISTING OF MONOTHIOGLYCEROL, THIOGLYCOL, B-MERCAPTOETHYLAMINE, N, N-DIETHYL-B-MERCAPTOETHYLAMINE AND 2-THIOBARBITURIC ACID.
Claim 2
Dependent Claim
57 words
A PROCESS FOR PRODUCING A STABLE PHOTOGRAPHIC SILVER IMAGE WHICH COMPRISES TREATING AN EXPOSED SILVER HALIDE EMULSION LAYER WITH AN ALKALINE SOLUTION CONTAIN ING (1) A COMPOUND OF THE CLASS CONSISTING OF HYDROXYLAMINE AND A 3-PYRAZOLIDONE SILVER HALIDE DEVELOPING AGENT, AND (2) A COMPOUND OF THE CLASS CONSISTING OF MONOTHIOGLYCEROL, THIOGLYCOL, B-MERCAPTOETHYLAMINE, N, N-DIETHYL-B-MERCAPTOETHYLAMINE AND 2-THIOBARBITURIC ACID.
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) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |