Patent US3754919A successfully refreshed from Google Patents.
US3754919A
Expired / Lapsed
US
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Photographic layers which contain uvabsorbers
Assignee: Agfa Gevaert AG
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Filing: 1971-12-21
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Granted: 1973-08-28
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Expires: 1991-12-21
Abstract
Abstract The light stability of color photographic images is improved by overcoating the image carrying layer with a UV-protective coating which contains a UV-absorbing compound. The UV-absorbing layer contains as UV-absorbent a 2-phenolbenzotriazole, the benzo ring of which is substituted with at least 1 alkoxy group.
Inventors
- 👤 J Sobel
- 👤 F Nittel
- 👤 W Himmelmann
- 👤 W Pelz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:15
CPC Classifications
C; C07; C07D; C07D249/00; C07D249/16; C07D249/18; C07D249/20; G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/8155
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
27 words
The photographic material of claim 1, wherein the UV-absorbent compound is contained in said layer in an emulsified form as a solution in a high boiling solvent.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |