Patent US5054086A successfully refreshed from Google Patents.
Patent US1525869A successfully refreshed from Google Patents.
US2632701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultraviolet filter on photographic layers
Assignee: Eastman Kodak Co
•
Filing: 1949-05-04
•
Granted: 1953-03-24
•
Expires: 1969-05-04
Abstract
No abstract record available.
Inventors
- 👤 Ilmari F Salminen
- 👤 Charles F H Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:56
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/8155; Y; Y10; Y10S; Y10S430/00; Y10S430/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
THE METHOD OF APPLYING AN ULTRA-VIOLET PROTECTIVE AGENT TO A DEVELOPED AND FIXED MULTI-LAYER PHOTOGRAPHIC ELEMENT HAVING SUPERPOSED DYE IMAGES AND HAVING A GELATIN LAYER AS THE OUTERMOST LAYER WHICH COMPRISES APPLYING TO SAID GELATIN LAYER FROM AQUEOUS NON-COLLOIDAL SOLUTION, A WATER-SOLUBLE SULFONIC ACID SALT OF A COMPOUND HAVING THE FOLLOWING STRUCTURE:
Claim 2
Independent Claim
52 words
THE METHOD OF APPLYING AN ULTRA-VIOLET PROTECTIVE AGENT TO A DEVELOPED AND FIXED MULTI-LAYER PHOTOGRAPHIC ELEMENT HAVING SUPERPOSED DYE IMAGES AND HAVING A GELATIN LAYER AS THE OUTERMOST LAYER WHICH COMPRISES APPLYING TO SAID GELATIN LAYER FROM AQUEOUS NON-COLLOIDAL SOLUTION, A WATER-SOLUBLE SULFONIC ACID SALT OF A COMPOUND HAVING THE FOLLOWING STRUCTURE:
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) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |