US2823136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of gelatin coatings having a roughened surface
Assignee: Eastman Kodak Co
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Filing: 1955-12-29
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Granted: 1958-02-11
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Expires: 1975-12-29
Abstract
No abstract record available.
Inventors
- 👤 Jr William J Knox
- 👤 John F Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:27
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/32; Y; Y10; Y10S; Y10S430/00; Y10S430/151
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A METHOD OF PREPARING GELATIN COATINGS HAVING A MATTE SURFACE WHICH COMPRISES SUPPLYING TO AN AQUEOUS SOLUTION OF GELATIN A SMALL PROPORTION OF AN ALKALINE EARTH METAL MALEOPIMARATE, APPLYING THE COMPOSITION TO A SUPPORT THEREFOR IN THE FORM OF A THIN LAYER AND DRYING THE THUS FORMED LAYER.
Claim 2
Independent Claim
48 words
A METHOD OF PREPARING GELATIN COATINGS HAVING A MATTE SURFACE WHICH COMPRISES SUPPLYING TO AN AQUEOUS SOLUTION OF GELATIN A SMALL PROPORTION OF AN ALKALINE EARTH METAL MALEOPIMARATE, APPLYING THE COMPOSITION TO A SUPPORT THEREFOR IN THE FORM OF A THIN LAYER AND DRYING THE THUS FORMED LAYER.
References Cited (Backward Citations)
US2009029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |