US3305364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-silver halide reducing sulfonamide buffers for photographic developing solutions
Assignee: Eastman Kodak Co
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Filing: 1963-09-03
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Granted: 1967-02-21
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Expires: 1983-09-03
Abstract
No abstract record available.
Inventors
- 👤 Charleton C Bard
- 👤 Judith A Larkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:34
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/305; G03C7/00; G03C7/30; G03C7/407; G03C7/413
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
A PHOTOGRAPHIC DEVELOPER COMPOSITION CONTAINING A PHOTOGRAPHIC SILVER HALIDE DEVELOPING AGENT AND A WATERSOLUBLE, NON-SILVER HALIDE REDUCING SULFONAMIDE BUFFER.
Claim 2
Dependent Claim
19 words
A PHOTOGRAPHIC DEVELOPER COMPOSITION CONTAINING A PHOTOGRAPHIC SILVER HALIDE DEVELOPING AGENT AND A WATERSOLUBLE, NON-SILVER HALIDE REDUCING SULFONAMIDE BUFFER.
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |