US2698967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of regenerated cellulose films and sheets
Assignee: Akzo Nobel UK PLC
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Filing: 1951-01-19
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Granted: 1955-01-11
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Expires: 1971-01-19
Abstract
No abstract record available.
Inventors
- 👤 Frank H Reichel
- 👤 Arthur O Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:37
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/04; B29C55/08; B29D; B29D7/00; B29D7/01; B29K; B29K2001/00; Y; Y10; Y10S; Y10S264/00; Y10S264/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR PRODUCING REGENERATED CELLULOSE FILMS COMPRISING EXTRUDING VISCOSE THROUGH A SLOT HAVING UNIFORM WIDTH THROUGHOUT ITS LENGTH INTO A LIQUID COAGULATING BATH, DRAWING THE EXTRUDED FILM THROUGH A PLURALITY OF LIQUID BATHS COMPRISING A REGENERATING BATH, AND AFTER DRYING THE LIQUID-TREATED REGENERATED CELLULOSE FILM TO A MOISTURE CONTENT OF 4 TO 8% BY WEIGHT WHILE PREVENTING LONGITUDINAL SHRINKAGE AND ALLOWING TRANSVERSE SHRINKAGE
Claim 2
Dependent Claim
64 words
A PROCESS FOR PRODUCING REGENERATED CELLULOSE FILMS COMPRISING EXTRUDING VISCOSE THROUGH A SLOT HAVING UNIFORM WIDTH THROUGHOUT ITS LENGTH INTO A LIQUID COAGULATING BATH, DRAWING THE EXTRUDED FILM THROUGH A PLURALITY OF LIQUID BATHS COMPRISING A REGENERATING BATH, AND AFTER DRYING THE LIQUID-TREATED REGENERATED CELLULOSE FILM TO A MOISTURE CONTENT OF 4 TO 8% BY WEIGHT WHILE PREVENTING LONGITUDINAL SHRINKAGE AND ALLOWING TRANSVERSE SHRINKAGE
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) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |