US2673153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic element and method of identification
Assignee: Eastman Kodak Co
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Filing: 1950-10-19
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Granted: 1954-03-23
•
Expires: 1970-10-19
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Talbot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:49
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/8155
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PHOTOGRAPHIC ELEMENT COMPRISING AT LEAST ONE PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER AND A COLORLESS CELLULOSE ACETATE LAYER CONTAINING FROM 0.01 TO 0.20 PER CENT BY WEIGHT, BASED ON THE CELLULOSE ACETATE, OF ANTHRACENE, SAID CELLULOSE ACETATE CONTAINING FROM 42.5 TO 44.0 PER CENT BY WEIGHT ACETYL.
Claim 2
Dependent Claim
47 words
A PHOTOGRAPHIC ELEMENT COMPRISING AT LEAST ONE PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER AND A COLORLESS CELLULOSE ACETATE LAYER CONTAINING FROM 0.01 TO 0.20 PER CENT BY WEIGHT, BASED ON THE CELLULOSE ACETATE, OF ANTHRACENE, SAID CELLULOSE ACETATE CONTAINING FROM 42.5 TO 44.0 PER CENT BY WEIGHT ACETYL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |