Patent US3215530A successfully refreshed from Google Patents.
US3215530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic element protected against fading and method of applying protective film thereto
Assignee: Agfa Gevaert NV
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Filing: 1961-10-31
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Granted: 1965-11-02
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Expires: 1981-10-31
Abstract
No abstract record available.
Inventors
- 👤 Riebel Alexander
- 👤 Klein Alfons
- 👤 Stroh Rudolf
- 👤 Ulrich Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:12
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/06; C09K15/08; G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/8155; G03C11/00; G03C11/08; G03C11/10; Y; Y10; Y10S; Y10S430/00; Y10S430/162
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A METHOD OF PREVENTING IMAGE DEGRADATION IN A FINISHED COLOR PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT AND SUPERPOSED THEREON A PLURALITY OF DEVELOPED AND FIXED PHOTOGRAPHIC EMULSION LAYERS CONTAINING COUPLEDDYE IMAGES, AT LEAST ONE OF THE SAID DY E IMAGES BEING SUBJECT TO FADING BY THE ACTION OF ULTRAVIOLET RADIATION, WHICH COMPRISES APPLYING TO THE SAID PHOTOGRAPHIC ELEMENT FROM A NONAQUEOUS SOLUTION A FILM OF A FILM-FORMING COPOLYMER OF MALEIC ANHYDIRDE AND A VINYL ALKYL ETHER, THE ALKYL GROUP OF WHICH CONTAINS UP TO 5 CARGON ATOMS, IN A MOLECULAR RATIO BETWEEN 0.5:1 AND 1.5:1 OF MALEIC ANHYDRIDE TO THE VINYL ALKYL ETHER, CONTAINING AN EFFECTIVE AMOUNT OF AN ULTRAVIOLET RADIATION -ABSORBING COMPOUND OF THE GROUP DONSISTING OF HYDROXY-SUBSTITUTED BENZOPHENONES HAVING THE FORMULA
Claim 2
Independent Claim
122 words
A METHOD OF PREVENTING IMAGE DEGRADATION IN A FINISHED COLOR PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT AND SUPERPOSED THEREON A PLURALITY OF DEVELOPED AND FIXED PHOTOGRAPHIC EMULSION LAYERS CONTAINING COUPLEDDYE IMAGES, AT LEAST ONE OF THE SAID DY E IMAGES BEING SUBJECT TO FADING BY THE ACTION OF ULTRAVIOLET RADIATION, WHICH COMPRISES APPLYING TO THE SAID PHOTOGRAPHIC ELEMENT FROM A NONAQUEOUS SOLUTION A FILM OF A FILM-FORMING COPOLYMER OF MALEIC ANHYDIRDE AND A VINYL ALKYL ETHER, THE ALKYL GROUP OF WHICH CONTAINS UP TO 5 CARGON ATOMS, IN A MOLECULAR RATIO BETWEEN 0.5:1 AND 1.5:1 OF MALEIC ANHYDRIDE TO THE VINYL ALKYL ETHER, CONTAINING AN EFFECTIVE AMOUNT OF AN ULTRAVIOLET RADIATION -ABSORBING COMPOUND OF THE GROUP DONSISTING OF HYDROXY-SUBSTITUTED BENZOPHENONES HAVING THE FORMULA
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |