Patent US1929953A successfully refreshed from Google Patents.
Patent US3011859A successfully refreshed from Google Patents.
US3011859A
Expired / Lapsed
US
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Manufacture of polymeric shaped objects by wet spinning
Assignee: Solutia Inc
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Filing: 1958-08-18
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Granted: 1961-12-05
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Expires: 1978-08-18
Abstract
No abstract record available.
Inventors
- 👤 John P Knudsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:53
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/08; D01F6/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR WET SPINNING FILAMENTS OF A CHLORINECONTAINING POLYMER OF A MOLECULAR WEIGHT OF 10,000150,000 HAVING AT LEAST A 50 PERCENT BY WEIGHT OF A POLYMERIZED MONOMER SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORIDE AND VINYLIDINE CHLORIDE AND AT MOST 50 PERCENT BY WEIGHT OF MONO-OLEFINIC MONOMER COPOLYMERIZED THEREWITH WHICH COMPRISES THE STEPS OF EXTRUDING THE SAID POLYMER DISSOLVED IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF N,NDIMETHYLFORMAMIDE AND N,NDIMETHYLACETAMIDE THROUGH A SPINNERET SUBMERGED IN A LIQUID COAGULATING BATH COMPOSED OF A POLYMERIC ETHER HAVING A MOLECULAR WEIGHT OF 200-6000 AND A GENERAL FORMULA: SPA@ HO(RO)NH
Claim 2
Dependent Claim
99 words
A PROCESS FOR WET SPINNING FILAMENTS OF A CHLORINECONTAINING POLYMER OF A MOLECULAR WEIGHT OF 10,000150,000 HAVING AT LEAST A 50 PERCENT BY WEIGHT OF A POLYMERIZED MONOMER SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORIDE AND VINYLIDINE CHLORIDE AND AT MOST 50 PERCENT BY WEIGHT OF MONO-OLEFINIC MONOMER COPOLYMERIZED THEREWITH WHICH COMPRISES THE STEPS OF EXTRUDING THE SAID POLYMER DISSOLVED IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF N,NDIMETHYLFORMAMIDE AND N,NDIMETHYLACETAMIDE THROUGH A SPINNERET SUBMERGED IN A LIQUID COAGULATING BATH COMPOSED OF A POLYMERIC ETHER HAVING A MOLECULAR WEIGHT OF 200-6000 AND A GENERAL FORMULA: SPA@ HO(RO)NH
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) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |