US2950197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardening of gelatin
Assignee: Eastman Kodak Co
•
Filing: 1956-07-25
•
Granted: 1960-08-23
•
Expires: 1976-07-25
Abstract
No abstract record available.
Inventors
- 👤 Charles F H Allen
- 👤 Eleanor R Webster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:59
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30; G03C1/302; C; C07; C07D; C07D203/00; C07D203/04; C07D203/06; C07D203/16; C07D203/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
61 words
A PROCESS FOR PREPARING PHOTOGRAPHIC PRODUCTS WHICH COMPRISES INCORPORATING IN A GELATIN-SILVER HALIDE PHOTOGRAPHIC EMULSION FROM 0.1 TO ABOUT 1.265%, BASED ON THE WEIGHT OF THE GELATIN, OF A COMPOUND CONTAINING AT LEAST TWO AZIRIDINE GROUPS, THE RING NITROGENS OF WHICH ARE LINKED DIRECTLY TO CARBONYL AND COATING THE PHOTOGRAPHIC EMULSION IN THE FORM OF A LYER UPON A SUPPORT THEREFOR.
Claim 2
Dependent Claim
61 words
A PROCESS FOR PREPARING PHOTOGRAPHIC PRODUCTS WHICH COMPRISES INCORPORATING IN A GELATIN-SILVER HALIDE PHOTOGRAPHIC EMULSION FROM 0.1 TO ABOUT 1.265%, BASED ON THE WEIGHT OF THE GELATIN, OF A COMPOUND CONTAINING AT LEAST TWO AZIRIDINE GROUPS, THE RING NITROGENS OF WHICH ARE LINKED DIRECTLY TO CARBONYL AND COATING THE PHOTOGRAPHIC EMULSION IN THE FORM OF A LYER UPON A SUPPORT THEREFOR.
Claim 3
Dependent Claim
36 words
A GELATIN-SILVER HALIDE PHOTOGRAPHIC EMULSION CONTAINING 0.1 TO ABOUT 1.265%, BASED ON THE WEIGHT OF THE GELATIN, OF A COMPOUND CONTAINING AT LEAST TWO AZIRIDINE GROUPS, THE RING NITROGENS OF WHICH ARE LINKED DIRECTLY TO CARBONYL.
Claim 4
Dependent Claim
36 words
A GELATIN-SILVER HALIDE PHOTOGRAPHIC EMULSION CONTAINING 0.1 TO ABOUT 1.265%, BASED ON THE WEIGHT OF THE GELATIN, OF A COMPOUND CONTAINING AT LEAST TWO AZIRIDINE GROUPS, THE RING NITROGENS OF WHICH ARE LINKED DIRECTLY TO CARBONYL.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |