Patent US4943519A successfully refreshed from Google Patents.
US4943519A
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Light sensitive, stabilized photographic recording material
Assignee: Agfa Gevaert AG
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Filing: 1986-01-07
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Granted: 1990-07-24
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Expires: 2006-01-07
Abstract
Abstract A photographic recording material contains a stabilizer in polymeric form corresponding to the following formula I <IMAGE> (I) wherein the substituents have the meanings stated in the description.
Inventors
- 👤 Gunter Helling
- 👤 Johannes Sobel
- 👤 Hans Langen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:41
CPC Classifications
C; C07; C07C; C07C255/00; G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/8155
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
146 words
Fhotographic recording material having at least one light sensitive silver halide emulsion layer, and at least one UV-stabilizer present in a polymeric form, in an amount of 50 to 1000 mg/m 2 of recording material, characterized in that the Uv-stabilizer has recurrent structural units corresponding to the following formula ##STR11## wherein R 1 denotes H or CH 3 R 4 denotes H or CH 3 , L 2 and L 3 , which may be identical or different, denote ethylene, propylene or butylene, R 11 denotes an unsubstituted or substituted alkyl group, R 12 denotes a cyano group or -SO 2 R 14 , R 13 denotes CN or COOR 15 , and R 14 /R 15 , which may be identical or different, denote an unsubstituted or substituted alkyl group having 1-20 carbon atoms or an unsubstituted or substituted aryl group having 6-20 carbon atoms.
Claim 2
Dependent Claim
146 words
Fhotographic recording material having at least one light sensitive silver halide emulsion layer, and at least one UV-stabilizer present in a polymeric form, in an amount of 50 to 1000 mg/m 2 of recording material, characterized in that the Uv-stabilizer has recurrent structural units corresponding to the following formula ##STR11## wherein R 1 denotes H or CH 3 R 4 denotes H or CH 3 , L 2 and L 3 , which may be identical or different, denote ethylene, propylene or butylene, R 11 denotes an unsubstituted or substituted alkyl group, R 12 denotes a cyano group or -SO 2 R 14 , R 13 denotes CN or COOR 15 , and R 14 /R 15 , which may be identical or different, denote an unsubstituted or substituted alkyl group having 1-20 carbon atoms or an unsubstituted or substituted aryl group having 6-20 carbon atoms.
Claim 3
Dependent Claim
20 words
Material according to claim 1, characterised in that the UV-absorber is arranged above the light sensitive silver halide emulsion layers.
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) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |