US2747996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic element protected against action of ultraviolet radiation
Assignee: Eastman Kodak Co
•
Filing: 1952-10-31
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Granted: 1956-05-29
•
Expires: 1972-10-31
Abstract
No abstract record available.
Inventors
- 👤 Richard O Edgerton
- 👤 Cyril J Staud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:53
CPC Classifications
G; G03; G03C; G03C11/00; G03C11/08; G03C11/10; G03C1/00; G03C1/76; G03C1/815; G03C1/8155; Y; Y10; Y10S; Y10S430/00; Y10S430/132
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
A METHOD OF PREVENTING IMAGE DEGRADATION IN A FINISHED PHOTOGRAPH ELEMENT COMPRISING A SUPPORT AND SUPERPOSED THEREON A PLURALITY OF DEVELOPED AND FIXED PHOTOGRAPHIC EMULSION LAYERS CONTAINING COUPLED-DYE IMAGES, AT LEAST ONE OF SAID DYE IMAGES BEING SUBJECT TO FADING BY THE ACTION OF ULTRAVIOLET LIGHT, SAID EMULSION LAYER CONTAINING A COUPLED-DYE IMAGE SUBJECT TO FADING LYING BETWEEN SAID SUPPORT AND A GELATIN LAYER CONTAINING AN ULTRAVIOLET LIGHT ABSORBING COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING FORMULAS:
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) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |