US3265506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yellow forming couplers
Assignee: Eastman Kodak Co
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Filing: 1964-05-04
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Granted: 1966-08-09
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Expires: 1984-05-04
Abstract
No abstract record available.
Inventors
- 👤 Weissberger Arnold
- 👤 Charles J Kibler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:09
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; G03C7/30511; G03C7/30517; G03C7/30535; G03C7/32; G03C7/36; G03C7/367
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING COATED THEREON AT LEAST ONE PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER AND IN CONTIGUITY THEREWITH A YELLOW DYEFORMING A COUPLER SELECTED FROM THOSE HAVING THE FORMULAS: (I) Q-CH(-A)-CO-N(-R)-R'' AND WHEREIN Q AND Q'' EACH REPRESENT A MEMBER HAVING FROM 5 TO 32 CARBON ATOMS SELECTED FROM THE CLASS CONSISTING OF ACYL GROUPS WHEREIN THE CARBON ATOM ATTACHED TO THE CARBONYL RADICAL OF SAID ACYL GROUP IS A TERTIARY CARBON ATOM AND THE SAID CARBONYL RADICAL IS ATTACHED DIRECTLY TO THE CARBON ATOM OF THE ACTIVE METHYLENE IN THE
Claim 2
Dependent Claim
94 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING COATED THEREON AT LEAST ONE PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER AND IN CONTIGUITY THEREWITH A YELLOW DYEFORMING A COUPLER SELECTED FROM THOSE HAVING THE FORMULAS: (I) Q-CH(-A)-CO-N(-R)-R'' AND WHEREIN Q AND Q'' EACH REPRESENT A MEMBER HAVING FROM 5 TO 32 CARBON ATOMS SELECTED FROM THE CLASS CONSISTING OF ACYL GROUPS WHEREIN THE CARBON ATOM ATTACHED TO THE CARBONYL RADICAL OF SAID ACYL GROUP IS A TERTIARY CARBON ATOM AND THE SAID CARBONYL RADICAL IS ATTACHED DIRECTLY TO THE CARBON ATOM OF THE ACTIVE METHYLENE IN THE
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |