US3207825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for extruding polytetrafluoroethylene-silicone rubber composition
Assignee: General Electric Co
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Filing: 1961-07-20
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Granted: 1965-09-21
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Expires: 1981-07-20
Abstract
No abstract record available.
Inventors
- 👤 Paul R Tully
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:53
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/06; H01B13/14; B; B29; B29C; B29C48/00; B29C48/022; C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; B29C48/03; B29C48/05; B29K; B29K2027/00; B29K2027/12; B29K2027/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE METHOD OF EXTRUDING A POLYTETRAFLUOROETHYLENE COMPOSITION WHICH COMPRISES INIMATELY ADMIXING A COAGULATED AQUEOUS COLLOIDAL POLYTETRAFLUOROETHYLENE SUSPENSION WITH 0.5% TO 10% BY WEIGHT OF A HEAT CURABLE SILICONE RUBBER COMPOSITION, AND 12% TO 20% BY WEIGHT OF AN ORGANIC LUBRICANT, PRESSURE-FORMING SAID MIXTURE INTO AN EXTRUDABLE PREFORM, EXTRUDING SAID MIXTURE, AND HEATING SAID EXTRUDED MIXTURE TO EVAPORATE SAID LUBRICANT, CURE SAID ORGANOPOLYSILOXANE, AND SINTER THE POLYTETRAFLUOROETHYLENE.
Claim 2
Independent Claim
66 words
THE METHOD OF EXTRUDING A POLYTETRAFLUOROETHYLENE COMPOSITION WHICH COMPRISES INIMATELY ADMIXING A COAGULATED AQUEOUS COLLOIDAL POLYTETRAFLUOROETHYLENE SUSPENSION WITH 0.5% TO 10% BY WEIGHT OF A HEAT CURABLE SILICONE RUBBER COMPOSITION, AND 12% TO 20% BY WEIGHT OF AN ORGANIC LUBRICANT, PRESSURE-FORMING SAID MIXTURE INTO AN EXTRUDABLE PREFORM, EXTRUDING SAID MIXTURE, AND HEATING SAID EXTRUDED MIXTURE TO EVAPORATE SAID LUBRICANT, CURE SAID ORGANOPOLYSILOXANE, AND SINTER THE POLYTETRAFLUOROETHYLENE.
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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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |