US2698796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin salts of couplers in mixed packet photographic emulsions
Assignee: Eastman Kodak Co
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Filing: 1953-03-26
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Granted: 1955-01-04
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Expires: 1973-03-26
Abstract
No abstract record available.
Inventors
- 👤 Chechak Jonas John
- 👤 Scheuring S Fierke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:09
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388; G03C7/3882
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
THE METHOD OF MAKING A COLOR-FORMING PHOTOGRAPHIC EMULSION WHICH COMPRISES DISPERSION IN GELATIN A SALT OF A COLORING MATERIAL SELECTED FROM THE CLASS CONSISTING OF COLOR COUPLERS AND POLYAZO DYES CONTAINING AT LEAST ONE SALT-FORMING ACID GROUP WITH A POLYVINYL RESIN CONTAINING PRYDYLAMINE GROUPS AND PYRIDINIUM QUATERNARY SALT GROUPS AND HAVING THE RECURRING STRUCTURE:
Claim 2
Independent Claim
54 words
THE METHOD OF MAKING A COLOR-FORMING PHOTOGRAPHIC EMULSION WHICH COMPRISES DISPERSION IN GELATIN A SALT OF A COLORING MATERIAL SELECTED FROM THE CLASS CONSISTING OF COLOR COUPLERS AND POLYAZO DYES CONTAINING AT LEAST ONE SALT-FORMING ACID GROUP WITH A POLYVINYL RESIN CONTAINING PRYDYLAMINE GROUPS AND PYRIDINIUM QUATERNARY SALT GROUPS AND HAVING THE RECURRING STRUCTURE:
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) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |