US2913351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic filter layers
Assignee: Agfa Gevaert NV
•
Filing: 1956-11-14
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Granted: 1959-11-17
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Expires: 1976-11-14
Abstract
No abstract record available.
Inventors
- 👤 Ossenbrunner Armin
- 👤 Klockgether Helfried
- 👤 Starck Werner
- 👤 Langbein Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:27
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31768
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PHOTOGRAPHIC ELEMENT COMPRISING IN COMBINATION A PHOTOGRAPHIC SUPPORT AND A LIGHT ABSORBING LAYER COATED ON SAID SUPPORT, SAID LAYER CONTAINING AS A BINDING AGENT A COPOLYMER CONSISTING ESSENTIALLY OF ACRYLONITRILE, VINYLBUTYL ETHER AND A SEMI-ESTER SELECTED FROM THE GROUP CONSISTING OF MALEIC AND FUMARIC SEMI-ESTERS OF A LOWER SATURATED ALIPHATIC MONOHYDRIC ALCOHOL SELECTED FROM THE GROUP CONSISTING OF METHANOL AND ETHANOL, THE VINYLBUTYL ETHER BEING PRESENT IN A MAJOR PROPORTION WITH RESPECT TO THE ACRYLONITRILE PRESENT, SAID SEMI-ESTER BEING INCORPORATED IN SAID COPOLYMER IN AN AMOUNT OF 40-60 MOL PERCENT AS CALCULATED ON THE TOTAL AMOUNT OF MONOMERS TO IMPART TO SAID COPOLYMER SOLUBILITY IN ALKALINE SILVER HALIDE DEVELOPING SOLUTIONS.
Claim 2
Dependent Claim
111 words
A PHOTOGRAPHIC ELEMENT COMPRISING IN COMBINATION A PHOTOGRAPHIC SUPPORT AND A LIGHT ABSORBING LAYER COATED ON SAID SUPPORT, SAID LAYER CONTAINING AS A BINDING AGENT A COPOLYMER CONSISTING ESSENTIALLY OF ACRYLONITRILE, VINYLBUTYL ETHER AND A SEMI-ESTER SELECTED FROM THE GROUP CONSISTING OF MALEIC AND FUMARIC SEMI-ESTERS OF A LOWER SATURATED ALIPHATIC MONOHYDRIC ALCOHOL SELECTED FROM THE GROUP CONSISTING OF METHANOL AND ETHANOL, THE VINYLBUTYL ETHER BEING PRESENT IN A MAJOR PROPORTION WITH RESPECT TO THE ACRYLONITRILE PRESENT, SAID SEMI-ESTER BEING INCORPORATED IN SAID COPOLYMER IN AN AMOUNT OF 40-60 MOL PERCENT AS CALCULATED ON THE TOTAL AMOUNT OF MONOMERS TO IMPART TO SAID COPOLYMER SOLUBILITY IN ALKALINE SILVER HALIDE DEVELOPING SOLUTIONS.
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) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |