US2500028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fine-grained bichromate sensitized photographic material
Assignee: Eastman Kodak Co
•
Filing: 1948-07-09
•
Granted: 1950-03-07
•
Expires: 1968-07-09
Abstract
No abstract record available.
Inventors
- 👤 William H Griggs
- 👤 Jr William F Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:02
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/66; G03F; G03F7/00; G03F7/004; G03F7/04; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/109; Y10S430/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A STABLE, LIGHT-SENSITIVE COATING COMPOSITION COMPRISING A MIXTURE OF BICHROMATED GELATIN AND AN AQUEOUS COLLOIDAL DISPERSION OF SOFT, WATER-INSOLUBLE POLYETHYLACRYLATE AND POLYVINYL ACETATE RESINS, THE LATTER RESIN BEING PRESENT IN AN AMOUNT FROM ABOUT 10 TO ABOUT 50 PER CENT OF THE WEIGHT OF SAID ACRYLATE RESIN AND THE AMOUNT OF GELATIN IN SAID COMPOSITION BEING OF THE ORDER OF FROM ABOUT 0.5 TO ABOUT 2 PARTS PER RESIN.
Claim 2
Dependent Claim
69 words
A STABLE, LIGHT-SENSITIVE COATING COMPOSITION COMPRISING A MIXTURE OF BICHROMATED GELATIN AND AN AQUEOUS COLLOIDAL DISPERSION OF SOFT, WATER-INSOLUBLE POLYETHYLACRYLATE AND POLYVINYL ACETATE RESINS, THE LATTER RESIN BEING PRESENT IN AN AMOUNT FROM ABOUT 10 TO ABOUT 50 PER CENT OF THE WEIGHT OF SAID ACRYLATE RESIN AND THE AMOUNT OF GELATIN IN SAID COMPOSITION BEING OF THE ORDER OF FROM ABOUT 0.5 TO ABOUT 2 PARTS PER RESIN.
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) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |