US2965437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for wet spinning plasticized elastomeric polymers and subsequently removing the plasticizer
Assignee: EIDP Inc
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Filing: 1958-04-02
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Granted: 1960-12-20
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Expires: 1978-04-02
Abstract
No abstract record available.
Inventors
- 👤 Richard N Blomberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:14
CPC Classifications
D; D01; D01F; D01F1/00; D01F1/02; D01F1/10; D01F6/00; D01F6/58; D01F6/72; D01F6/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN THE PROCESS OF WET SPINNING ELASTOMERIC POLYMERS IN WHICH THE SAID POLYMER IS DISSOLVED IN A SOLVENT MIXTURE AND THEREAFTER EXTRUDED THROUGH A SPINNERET INTO AN AQUEOUS COAGULATING MEDIUM, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE SOLVENT MIXTURE A WATER-INSOLUBLE PLASTICIZER FOR THE POLYMER AND AFTER EXTRUDING SAID MIXTURE THROUGH SAID SPINNERET SUBSTANTIALLY REMOVING SAID PLASTICIZER FROM SAID POLYMER.
Claim 2
Dependent Claim
60 words
IN THE PROCESS OF WET SPINNING ELASTOMERIC POLYMERS IN WHICH THE SAID POLYMER IS DISSOLVED IN A SOLVENT MIXTURE AND THEREAFTER EXTRUDED THROUGH A SPINNERET INTO AN AQUEOUS COAGULATING MEDIUM, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE SOLVENT MIXTURE A WATER-INSOLUBLE PLASTICIZER FOR THE POLYMER AND AFTER EXTRUDING SAID MIXTURE THROUGH SAID SPINNERET SUBSTANTIALLY REMOVING SAID PLASTICIZER FROM SAID POLYMER.
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) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |