US2870012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microdispersions of photographic color couplers
Assignee: Eastman Kodak Co
•
Filing: 1955-12-23
•
Granted: 1959-01-20
•
Expires: 1975-12-23
Abstract
No abstract record available.
Inventors
- 👤 Godowsky Leopold
- 👤 Jerome J Duane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:50
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388; C; C09; C09K; C09K23/00; C09K23/017
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
THE METHOD OF MAKING A DISPERSION IN GELATIN OF A WATER-INSOLUBLE COLOR COUPLER CAPABLE OF COUPLING WITH THE OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINO DEVELOPING AGENT AND CONTAINING AT LEAST ONE CARBOXYL GROUP, WHICH COMPRISES DISSOLVING SAID CARBOXYL-CONTAINING COUPLER IN A WATER-MISCIBLE SOLVENT FOR SAID COUPLER, THEN ADDING WATER AND A DISPERSING AGENT TO THE SOLUTION OF COUPLER AND WATER-MISCIBLE SOLVENT UNTIL SAID COUPLER IS PRECIPITATED AS A DISPERSION, REMOVING SAID WATERMISCIBLE SOLVENT FROM SAID DISPERSION, AND INCORPORATING THE DISPERSION IN GELATIN.
Claim 2
Independent Claim
83 words
THE METHOD OF MAKING A DISPERSION IN GELATIN OF A WATER-INSOLUBLE COLOR COUPLER CAPABLE OF COUPLING WITH THE OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINO DEVELOPING AGENT AND CONTAINING AT LEAST ONE CARBOXYL GROUP, WHICH COMPRISES DISSOLVING SAID CARBOXYL-CONTAINING COUPLER IN A WATER-MISCIBLE SOLVENT FOR SAID COUPLER, THEN ADDING WATER AND A DISPERSING AGENT TO THE SOLUTION OF COUPLER AND WATER-MISCIBLE SOLVENT UNTIL SAID COUPLER IS PRECIPITATED AS A DISPERSION, REMOVING SAID WATERMISCIBLE SOLVENT FROM SAID DISPERSION, AND INCORPORATING THE DISPERSION IN GELATIN.
References Cited (Backward Citations)
US2280722A
Cited
US2304940A
Cited
US2322027A
Cited
US2403721A
Cited
US2478400A
Cited
US2698794A
Cited
US2652329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |