US3132194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of microporous filamentous articles
Assignee: Phillips Petroleum Co
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Filing: 1962-04-09
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Granted: 1964-05-05
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Expires: 1982-04-09
Abstract
No abstract record available.
Inventors
- 👤 Jr James T Edmonds
- 👤 Gardner C Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:37
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/24; D01D5/247; D01F; D01F13/00; D01F13/04; D01F6/00; D01F6/44; D01F6/46; Y; Y02; Y02P; Y02P70/00; Y02P70/50; Y02P70/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR THE PRODUCTION OF A POROUS FILAMENT WHICH COMPRISES THE STEPS OF BLENDING A 1-OLEFIN POLYMER WITH FROM 5 TO 50 WEIGHT PERCENT OF A STYRENE POLYMER, SHAPING SAID BLEND INTO A FILAMENT, DRAWING THE FILAMENT FORMED FROM SAID BLEND TO ORIENT SAME, AND REMOVING A SUBSTANTIAL PORITON OF SAID STYRENE POLYMER FROM SAID FILAMENT BY CONTACTING SAME WITH AN AROMATIC HYDROCARBON SOLVENT AT A TEMPERATURE RANGING FROM ABOUT 40*F. TO ABOUT THE CLOUD POINT OF SAID 1-OLEFIN POLYMER, THUS LEAVING A POROUS FILAMENT OF SAID 1-OLEFIN POLYMER.
Claim 2
Dependent Claim
90 words
A PROCESS FOR THE PRODUCTION OF A POROUS FILAMENT WHICH COMPRISES THE STEPS OF BLENDING A 1-OLEFIN POLYMER WITH FROM 5 TO 50 WEIGHT PERCENT OF A STYRENE POLYMER, SHAPING SAID BLEND INTO A FILAMENT, DRAWING THE FILAMENT FORMED FROM SAID BLEND TO ORIENT SAME, AND REMOVING A SUBSTANTIAL PORITON OF SAID STYRENE POLYMER FROM SAID FILAMENT BY CONTACTING SAME WITH AN AROMATIC HYDROCARBON SOLVENT AT A TEMPERATURE RANGING FROM ABOUT 40*F. TO ABOUT THE CLOUD POINT OF SAID 1-OLEFIN POLYMER, THUS LEAVING A POROUS FILAMENT OF SAID 1-OLEFIN 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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |