US2494951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing regenerated cellulose webs
Assignee: Svenska Rayon AB
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Filing: 1949-02-15
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Granted: 1950-01-17
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Expires: 1969-02-15
Abstract
No abstract record available.
Inventors
- 👤 Lindquist Curt Axel John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:39
CPC Classifications
B; B29; B29D; B29D7/00; B29C; B29C71/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
THE PROCESS OF MANUFACTURING CONTINUOUS REGENERATED CELLULOSE WEBS WHICH COMPRISES SIMULTANEOUSLY EXTRUDING VISCOSE SOLUTION FROM A PAIR OF SPACED NOZZLES IN SHEET FORM INTO A LIQUID HAVING COAGULATING AND REGENERATING PROPERTIES AND KEEPING THE NASCENT WEBS SEGREGATED IN SAID LIQUID UNTIL COMPLETELY REGENERATED SURFACE FILMS ARE FORMED ON EACH WEB, THEN BRINGING THE WEBS TOGETHER WITH THEIR ADJACENT SURFACES IN CONTACT WITH EACH OTHER AND MAINTAINING SAID SURFACES IN CONTACT AT ALL TIMES WHILE ADVANCING SAID WEBS THROUGH REGENERATING LIQUID UNTIL THE CONVERSION FROM THE XANTHATE TO CELLULOSE IS EFFECTED ENTIRELY
Claim 2
Dependent Claim
91 words
THE PROCESS OF MANUFACTURING CONTINUOUS REGENERATED CELLULOSE WEBS WHICH COMPRISES SIMULTANEOUSLY EXTRUDING VISCOSE SOLUTION FROM A PAIR OF SPACED NOZZLES IN SHEET FORM INTO A LIQUID HAVING COAGULATING AND REGENERATING PROPERTIES AND KEEPING THE NASCENT WEBS SEGREGATED IN SAID LIQUID UNTIL COMPLETELY REGENERATED SURFACE FILMS ARE FORMED ON EACH WEB, THEN BRINGING THE WEBS TOGETHER WITH THEIR ADJACENT SURFACES IN CONTACT WITH EACH OTHER AND MAINTAINING SAID SURFACES IN CONTACT AT ALL TIMES WHILE ADVANCING SAID WEBS THROUGH REGENERATING LIQUID UNTIL THE CONVERSION FROM THE XANTHATE TO CELLULOSE IS EFFECTED ENTIRELY
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) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |