Patent US2848747A successfully refreshed from Google Patents.
US2848747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube extrusion
Assignee: Olin Corp
•
Filing: 1955-09-23
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Granted: 1958-08-26
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Expires: 1975-09-23
Abstract
No abstract record available.
Inventors
- 👤 Glenn R Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:02
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/16; B29C48/18; B29C48/21; B29C48/001; B29C48/0013; B29C48/0015; B29C48/0016; B29C48/03; B29C48/09; Y; Y10; Y10S; Y10S264/00; Y10S264/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A METHOD FOR PRODUCING CELLULOSE FILM COMPRISING CONTINUOUSLY CASTING A CELLULOSE FILM FORMING SOLUTION UPON A NEWLY EXTRUDED THERMOPLASTIC TUBE, EXPANDING THE COMPOSITE TUBE AND CAST FILM, UTILIZING THE HEAT INHERENT IN THE NEWLY EXTRUDED TUBE TO DRY THE FILM UPON SAID TUBE, SLITTING THE CELLULOSE FILM AND STRIPPING IT FROM THE THERMOPLASTIC TUBE.
Claim 2
Independent Claim
54 words
A METHOD FOR PRODUCING CELLULOSE FILM COMPRISING CONTINUOUSLY CASTING A CELLULOSE FILM FORMING SOLUTION UPON A NEWLY EXTRUDED THERMOPLASTIC TUBE, EXPANDING THE COMPOSITE TUBE AND CAST FILM, UTILIZING THE HEAT INHERENT IN THE NEWLY EXTRUDED TUBE TO DRY THE FILM UPON SAID TUBE, SLITTING THE CELLULOSE FILM AND STRIPPING IT FROM THE THERMOPLASTIC TUBE.
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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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |