Patent US2289411A successfully refreshed from Google Patents.
Patent US3140177A successfully refreshed from Google Patents.
US3140177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processing color photographic materials
Assignee: Eastman Kodak Co
•
Filing: 1960-11-10
•
Granted: 1964-07-07
•
Expires: 1980-11-10
Abstract
No abstract record available.
Inventors
- 👤 Maurice E Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:49
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN THE PREPARATION OF A FINISHED MULTICOLOR PHOTOGRAPHIC ELEMENT CONTAINING IN A GELATIN SUBSTRATE A MAGENTA IMAGE AND A SUBSTNATIAL AMOUNT OF RESIDUAL PYRAZOLONE PHOTGRAPHIC COLOR COUPLER CAPABLE OF COUPLING WITH THE OXIDATION PRODUCTS OF AN AROMATIC AMINO PHOTOGRAPHIC COLOR DEVELOPER TO FORM A MAGENTA IMAGE, THE PROCESS WHICH COMPRISES TREATING AS A FINAL PROCESSING STEP SAID PHOTOGRAPHIC ELEMENT WITH AN AQUEOUS TREATING BATH COMPRISING (1) 0.1% TO 10% OF AN ALDEHYDE SELECTED FROM THE CLASS CONSISTING OF FORMALDEHYDE AND ACETALDEHYDE, AND (2) 0.5% TO 15% OF A WATER-SOLUBLE POLYCARBOXYLIC ACID HAVING 2 TO 6 CARBON ATOMS, SAID TREATING BATH HAVING A PH OF ABOUT 3 TO 4, AND THEREBY HARDENING SAID GELATIN AND REDUCING FADING OF SAID MAGENTA IMAGE.
Claim 2
Dependent Claim
120 words
IN THE PREPARATION OF A FINISHED MULTICOLOR PHOTOGRAPHIC ELEMENT CONTAINING IN A GELATIN SUBSTRATE A MAGENTA IMAGE AND A SUBSTNATIAL AMOUNT OF RESIDUAL PYRAZOLONE PHOTGRAPHIC COLOR COUPLER CAPABLE OF COUPLING WITH THE OXIDATION PRODUCTS OF AN AROMATIC AMINO PHOTOGRAPHIC COLOR DEVELOPER TO FORM A MAGENTA IMAGE, THE PROCESS WHICH COMPRISES TREATING AS A FINAL PROCESSING STEP SAID PHOTOGRAPHIC ELEMENT WITH AN AQUEOUS TREATING BATH COMPRISING (1) 0.1% TO 10% OF AN ALDEHYDE SELECTED FROM THE CLASS CONSISTING OF FORMALDEHYDE AND ACETALDEHYDE, AND (2) 0.5% TO 15% OF A WATER-SOLUBLE POLYCARBOXYLIC ACID HAVING 2 TO 6 CARBON ATOMS, SAID TREATING BATH HAVING A PH OF ABOUT 3 TO 4, AND THEREBY HARDENING SAID GELATIN AND REDUCING FADING OF SAID MAGENTA IMAGE.
References Cited (Backward Citations)
US2518686A
Cited
US2579435A
Cited
US2579436A
Cited
US2657139A
Cited
US2788274A
Cited
US2913338A
Cited
US3095302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |