US3666478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic material containing aliphatic perfluoro compounds
Assignee: BASF Schweiz AG
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Filing: 1969-09-18
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Granted: 1972-05-30
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Expires: 1989-09-18
Abstract
Abstract PHOTOGRAPHIC MATERIAL, PREFERABLY FOR THE SILVER DYESTUFF BLEACHING METHOD, IS PROVIDED WHICH CONTAINS IN AT LEAST ONE GELATINE-CONTAINING LAYER AS A WETTING AGENT A WATERSOLUBLE, SURFACE-ACTIVE PERFLUORO COMPOUND. WITH THESE WETTING AGENTS A VERY GOOD UNIFORMITY OF THE APPLIED GELATINE LAYERS IS ACHIEVED.
Inventors
- 👤 Margit Groh
- 👤 Alfred Oetiker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:41
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/38; G03C1/385; G03C7/00; G03C7/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |