US2962766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing cellulose film using a flowing coagulating bath
Assignee: EIDP Inc
•
Filing: 1957-10-11
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Granted: 1960-12-06
•
Expires: 1977-10-11
Abstract
No abstract record available.
Inventors
- 👤 Hinkle Barton Leslie
- 👤 Stults Frederick Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:29
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/919; B29C48/03; B29C48/07; B29C48/08; B29C48/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
IN A PROCESS FOR PREPARING REGENERATED CELLULOSE FILM WHEREIN VISCOSE IS EXTRUDED INTO A ACID-SULFATE BATH TO FORM A GEL FILM AND THE GEL FILM IS SUBSEQUENTLY REGENERATED AND WASHED FREE FROM IMPURITIES, THE IMPROVEMENT WHICH COMPRISES CONVEYING A THIN LAYER OF ACID-SULFATE LIQUID ON A MOVING ENDLESS BELT AND CONTINUOUSLY DRAW-
Claim 2
Dependent Claim
52 words
IN A PROCESS FOR PREPARING REGENERATED CELLULOSE FILM WHEREIN VISCOSE IS EXTRUDED INTO A ACID-SULFATE BATH TO FORM A GEL FILM AND THE GEL FILM IS SUBSEQUENTLY REGENERATED AND WASHED FREE FROM IMPURITIES, THE IMPROVEMENT WHICH COMPRISES CONVEYING A THIN LAYER OF ACID-SULFATE LIQUID ON A MOVING ENDLESS BELT AND CONTINUOUSLY DRAW-
References Cited (Backward Citations)
US1153004A
Cited
US1837854A
Cited
DE547618C
Cited
US2037292A
Cited
US2319305A
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US2534629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |