Patent US3073733A successfully refreshed from Google Patents.
US3073733A
Expired / Lapsed
US
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Film and method of casting film
Assignee: EIDP Inc
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Filing: 1960-05-31
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Granted: 1963-01-15
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Expires: 1980-05-31
Abstract
No abstract record available.
Inventors
- 👤 Mitchell James Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:23
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/919; B29C48/03; B29C48/07; B29C48/08; B29C48/911; B29C48/9135; B29C48/914; B29C48/9175; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
IN A PROCESS FOR PREPARING REGENERATED CELLULOSE FILM WHEREIN VISCOSE IS EXTRUDED IN THE FORM OF A GEL FILM INTO A BATH OF ACID-SULFATE LIQUID AND THE GEL FIRM IS SUBSEQUENTLY REMOVED FROM THE BATH AND SUBJECTED TO TREATMENTS THAT INCLUDE WASHING AND DRYING TO FORM A REGENERATED CELLULOSE FILM, THE IMPROVEMENT WHICH COMPRISES EXTABLISHING A STREAM OF ACID-SULFATE LIQUID FROM SAID BATH IN A DOWNWARDLY DECLINED FLUME BY FLOWING LIQUID FROM SAID BATH DIRECTLY TO SAID FLUME; CONVEYING THE STREAM OF ACID-SULFATE LIQUID IN SAID FLUME AT A SPEED CONTROLLED BY THE INCLINATION OF SAID FLUME; EXGTRUDING SAID VISCOSE IN THE FORM OF A GEL FILM BELOW THE SURFACE OF SAID BATH AND, IMMEDIATELY THEREAFTER, PASSING SAID FILM INTO THE STREAM ESTABLISHED IN SAID FLUME; AND CONTINUOUSLY DRAWING SAID FILM INDEPENDENT OF THE SPEED OF SAID LIQUID STREAM, THE LIQUID IN CONTACT WITH SAID FILM BEING ONLY ENOUGH OF SUBSTANTIALLY COMPLETE COAGULATION OF THE FILM IN CONTACT THEREWITH.
Claim 2
Dependent Claim
159 words
IN A PROCESS FOR PREPARING REGENERATED CELLULOSE FILM WHEREIN VISCOSE IS EXTRUDED IN THE FORM OF A GEL FILM INTO A BATH OF ACID-SULFATE LIQUID AND THE GEL FIRM IS SUBSEQUENTLY REMOVED FROM THE BATH AND SUBJECTED TO TREATMENTS THAT INCLUDE WASHING AND DRYING TO FORM A REGENERATED CELLULOSE FILM, THE IMPROVEMENT WHICH COMPRISES EXTABLISHING A STREAM OF ACID-SULFATE LIQUID FROM SAID BATH IN A DOWNWARDLY DECLINED FLUME BY FLOWING LIQUID FROM SAID BATH DIRECTLY TO SAID FLUME; CONVEYING THE STREAM OF ACID-SULFATE LIQUID IN SAID FLUME AT A SPEED CONTROLLED BY THE INCLINATION OF SAID FLUME; EXGTRUDING SAID VISCOSE IN THE FORM OF A GEL FILM BELOW THE SURFACE OF SAID BATH AND, IMMEDIATELY THEREAFTER, PASSING SAID FILM INTO THE STREAM ESTABLISHED IN SAID FLUME; AND CONTINUOUSLY DRAWING SAID FILM INDEPENDENT OF THE SPEED OF SAID LIQUID STREAM, THE LIQUID IN CONTACT WITH SAID FILM BEING ONLY ENOUGH OF SUBSTANTIALLY COMPLETE COAGULATION OF THE FILM IN CONTACT THEREWITH.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |