US2944296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of improved regenerated cellulose films
Assignee: EIDP Inc
•
Filing: 1956-02-02
•
Granted: 1960-07-12
•
Expires: 1976-02-02
Abstract
No abstract record available.
Inventors
- 👤 Mitchell James Albert
- 👤 Hinkle Barton Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:53
CPC Classifications
A; A23; A23G; A23G3/00; A23G3/02; A23G3/20; A23G3/2007; A23G3/2023; A21; A21C; A21C15/00; A21C15/002; B; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/92; B29D; B29D7/00; B29D7/01; C; C08; C08J; C08J5/00; C08J5/18; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92028; B29C2948/92085; B29C2948/92209; B29C2948/92314; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C2948/92923; B29C2948/92942; C08J2301/00; C08J2301/08; C08J2301/22; C08J2301/24; Y; Y10; Y10S; Y10S264/00; Y10S264/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS FOR PRODUCING REGENERATED CELLULOSE FILM OF IMPROVED TEAR AND IMPACT STRENGTHS WHICH COMPRISES CASTING A VISCOSE SOLUTION AT A TEMPERATURE OF 38* C. TO 50* C. INTO A COAGULATING AND REGENERATING BATH MAINTAINED AT A TEMPERATURE OF 40* C. TO 55* C., STRETCHING THE PARTIALLY REGENERATED FILM PRIOR TO COMPLETING REGENERATION, SAID STRETCHING BEING LESS THAN 25%, WASHING THE FILM AFTER COMPLETING REGENERATION, AND DRYING THE FILM.
Claim 2
Dependent Claim
69 words
A PROCESS FOR PRODUCING REGENERATED CELLULOSE FILM OF IMPROVED TEAR AND IMPACT STRENGTHS WHICH COMPRISES CASTING A VISCOSE SOLUTION AT A TEMPERATURE OF 38* C. TO 50* C. INTO A COAGULATING AND REGENERATING BATH MAINTAINED AT A TEMPERATURE OF 40* C. TO 55* C., STRETCHING THE PARTIALLY REGENERATED FILM PRIOR TO COMPLETING REGENERATION, SAID STRETCHING BEING LESS THAN 25%, WASHING THE FILM AFTER COMPLETING REGENERATION, AND DRYING THE FILM.
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |