Patent US3116353A successfully refreshed from Google Patents.
US3116353A
Expired / Lapsed
US
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Spinning viscose
Assignee: Beaunit Corp
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Filing: 1957-05-02
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Granted: 1963-12-31
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Expires: 1977-05-02
Abstract
No abstract record available.
Inventors
- 👤 Paul V Brower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:08
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS FOR THE PRODUCTION OF IMPROVED, CELLULOSIC PRODUCTS WHICH COMPRISES MODIFYING A VISCOSE BY ADDING THERETO A SOLUBLE-VISCOSE-COAGULATING SALT OF A STRONG BASE AND A WEAK ACID, AND EXTRUDING THE RESULTANT VISCOSE INTO AN ACID SPIN BATH IN THE PRESENCE OF A POLYALKYLENE GLYCOL HAVING AN AVERAGE MOLECULAR WEIGHT OF AT LEAST ABOUT 400 AND AN HYDROXY FATTY ACID.
Claim 2
Dependent Claim
60 words
A PROCESS FOR THE PRODUCTION OF IMPROVED, CELLULOSIC PRODUCTS WHICH COMPRISES MODIFYING A VISCOSE BY ADDING THERETO A SOLUBLE-VISCOSE-COAGULATING SALT OF A STRONG BASE AND A WEAK ACID, AND EXTRUDING THE RESULTANT VISCOSE INTO AN ACID SPIN BATH IN THE PRESENCE OF A POLYALKYLENE GLYCOL HAVING AN AVERAGE MOLECULAR WEIGHT OF AT LEAST ABOUT 400 AND AN HYDROXY FATTY ACID.
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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) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |