US2709146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of moistureproof regenerated cellulose films
Assignee: British Cellophane Ltd
•
Filing: 1951-08-14
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Granted: 1955-05-24
•
Expires: 1971-08-14
Abstract
No abstract record available.
Inventors
- 👤 Berry William
- 👤 Oswin Charles Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:26
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/048; C08J7/052; C08J2301/00; C08J2301/06; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1059
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCESS FOR THE PRODUCTION OF MOISTUREPROOF REGENERATED CELLULOSE FILM, COATED ON ONE SIDE ONLY WITH A MOISTUREPROOFING COATING, WHICH PROCESS COMPRISES THE STEPS OF BRINGING A PAIR OF PURIFIED REGENERATED CELLULOSE FILMS IN THE GEL STATE INTO CONTINUOUS INTIMATE CONTACT, DRYING THE PAIR OF FILMS IN CONTINUOUS CONTACT SO INTIMATE THAT THEY CONSTITUTE TOGETHER AN OPTICALLY UNITARY FILM COATING SAID DRIED OPTICALLY UNITARY FILM ON BOTH SIDES WITH A MOISTUREPROOFING COATING, AND FINALLY SEPARATING THE FILMS OF THE PAIR.
Claim 2
Dependent Claim
80 words
A PROCESS FOR THE PRODUCTION OF MOISTUREPROOF REGENERATED CELLULOSE FILM, COATED ON ONE SIDE ONLY WITH A MOISTUREPROOFING COATING, WHICH PROCESS COMPRISES THE STEPS OF BRINGING A PAIR OF PURIFIED REGENERATED CELLULOSE FILMS IN THE GEL STATE INTO CONTINUOUS INTIMATE CONTACT, DRYING THE PAIR OF FILMS IN CONTINUOUS CONTACT SO INTIMATE THAT THEY CONSTITUTE TOGETHER AN OPTICALLY UNITARY FILM COATING SAID DRIED OPTICALLY UNITARY FILM ON BOTH SIDES WITH A MOISTUREPROOFING COATING, AND FINALLY SEPARATING THE FILMS OF THE PAIR.
References Cited (Backward Citations)
US1983875A
Cited
US1826696A
Cited
US1983520A
Cited
US2046848A
Cited
US2448357A
Cited
US2587171A
Cited
US2626886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |