US2935371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for interfacial spinning in which one phase contains a thickening agent
Assignee: EIDP Inc
•
Filing: 1954-05-05
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Granted: 1960-05-03
•
Expires: 1974-05-05
Abstract
No abstract record available.
Inventors
- 👤 Eugene E Magat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:58
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/38; D01D5/28; D01D5/30; D01D5/34; D01F; D01F1/00; D01F1/02; D01F1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN A PROCESS OF FORMING A SELF-SUPPORTING POLYMERIC ARTICLE AT AN INTERFACE OF CONTROLLED SHAPE BETWEEN COACTING REACTANT PHASES WHEREIN A CONDENSATION POLYMER IS FORMED BY EXTRUDING A STREAM OF ONE REACTANT PHASE INTO A BATH OF OTHER REACTANT PHASE, THE IMPROVEMENT COMPRISING ADDING TO THE PHASE TO BE EXTRUDED A RELATIVELY UNREACTIVE THICKENING AGENT EFFECTIVE TO INCREASE THE VISCOSITY OF THAT PHASE APPRECIABLY ABOVE THE ORIGINAL VISCOSITY
Claim 2
Dependent Claim
68 words
IN A PROCESS OF FORMING A SELF-SUPPORTING POLYMERIC ARTICLE AT AN INTERFACE OF CONTROLLED SHAPE BETWEEN COACTING REACTANT PHASES WHEREIN A CONDENSATION POLYMER IS FORMED BY EXTRUDING A STREAM OF ONE REACTANT PHASE INTO A BATH OF OTHER REACTANT PHASE, THE IMPROVEMENT COMPRISING ADDING TO THE PHASE TO BE EXTRUDED A RELATIVELY UNREACTIVE THICKENING AGENT EFFECTIVE TO INCREASE THE VISCOSITY OF THAT PHASE APPRECIABLY ABOVE THE ORIGINAL VISCOSITY
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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) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |