US2559893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating cellulose ester films
Assignee: Eastman Kodak Co
•
Filing: 1946-10-04
•
Granted: 1951-07-10
•
Expires: 1966-10-04
Abstract
No abstract record available.
Inventors
- 👤 Gale F Nadeau
- 👤 Fred W Hoyt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:32
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/95; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/259
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE METHOD OF PREVENTING OPTICAL CONTACT BETWEEN SUPERIMPOSED SURFACES OF TRANSPARENT CELLULOSE ESTER FILMS WITHOUT SUBSTANTIALLY IMPAIRING THE TRANSPARENCY OF THE FILMS COMPRISING SUBSTANTIALLY UNIFORMLY COATING AT LEAST ONE SURFACE OF THE FILM WITH A SUSPENSION CONTAINING 0.1 TO 0.2% BENTONITE PARTICLES OF A PARTICLE SIZE WITHIN THE RANGE OF 50 TO <5 MICRONS IN A SOLUTION OF 0.5% LOW VISCOSITY CELLULOSE ACETATE IN 55% METHANOL, 10% METHYL CELLOSOLVE AND 35% ACETONE, AND AFFIXING THE BENTONITE PARTICLES TO THE SURFACES BY DRYING THE COATING.
Claim 2
Independent Claim
84 words
THE METHOD OF PREVENTING OPTICAL CONTACT BETWEEN SUPERIMPOSED SURFACES OF TRANSPARENT CELLULOSE ESTER FILMS WITHOUT SUBSTANTIALLY IMPAIRING THE TRANSPARENCY OF THE FILMS COMPRISING SUBSTANTIALLY UNIFORMLY COATING AT LEAST ONE SURFACE OF THE FILM WITH A SUSPENSION CONTAINING 0.1 TO 0.2% BENTONITE PARTICLES OF A PARTICLE SIZE WITHIN THE RANGE OF 50 TO <5 MICRONS IN A SOLUTION OF 0.5% LOW VISCOSITY CELLULOSE ACETATE IN 55% METHANOL, 10% METHYL CELLOSOLVE AND 35% ACETONE, AND AFFIXING THE BENTONITE PARTICLES TO THE SURFACES BY DRYING THE COATING.
References Cited (Backward Citations)
US2084313A
Cited
US1982778A
Cited
US2147312A
Cited
US2266638A
Cited
US2245499A
Cited
US2338664A
Cited
US2332696A
Cited
US2386626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |