US3379533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyes derived from 1, 2-disubstituted-3, 5-pyrazolidinediones and photographic elements containing such dyes
Assignee: Eastman Kodak Co
•
Filing: 1963-06-10
•
Granted: 1968-04-23
•
Expires: 1983-06-10
Abstract
No abstract record available.
Inventors
- 👤 Philip W Jenkins
- 👤 Leslie G S Brooker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:24
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C1/832; C; C09; C09B; C09B23/00; C09B23/02; C09B23/04; C09B23/06; C09B23/08; C09B23/083; C09B23/10; C09B23/105; C09B23/107; C09B23/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
19 words
A LIGHT-SENSITIVE PHOTOGRAPHIC EMULSION COMPRISING A HYDROPHILIC COLLOID, SILVER HALIDE AND A DYE SELECTED FROM THOSE HAVING THE FORMULA:
References Cited (Backward Citations)
US2272163A
Cited
US2427911A
Cited
US2639282A
Cited
GB781551A
Cited
US2955939A
Cited
US2895955A
Cited
US2984664A
Cited
US2965486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |