US3687671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic layers containing compounds which absorb ultraviolet light
Assignee: Agfa Gevaert AG
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Filing: 1970-12-15
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Granted: 1972-08-29
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Expires: 1990-12-15
Abstract
Abstract THE LIGHT STABILITY OF PHOTOGRAPHIC DYE IMAGES ARE IMPROVED BY APPLYING A UV-ABSORBING LAYER CONTAINING A COMBINATION OF UV-ABSORBENTS.
Inventors
- 👤 Manfred Kreuder
- 👤 Wolfgang Metzner
- 👤 Johannes Sobel
- 👤 Wolfgang Himmelmann
- 👤 Fritz Nittel
- 👤 Willibald Pelz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:40
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/8155
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |