US3093479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of quaternary ammonium compounds for stabilizing processed photographic elements
Assignee: Eastman Kodak Co
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Filing: 1958-12-12
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Granted: 1963-06-11
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Expires: 1978-12-12
Abstract
No abstract record available.
Inventors
- 👤 Ismael A Olivares
- 👤 Galvez Delfin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:50
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/38
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
36 words
A PROCESS IN WHICH A DEVELOLPED AND FIXED SILVER IMAGE IN A PHOTOGRAPHIC ELEMENT IS (1) TREATED IN AN AQUEOUS SOLUTION CONTAINING AT LEAST 0.25 PERCENT BY WEIGHT OF A SURFACE ACTIVE COMPOUND OF THE 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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |