Patent US5247658A successfully refreshed from Google Patents.
Patent US3294871A successfully refreshed from Google Patents.
US3294871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly (tetrafluoroethylene)-thermoplastic resin composition
Assignee: Wyeth Holdings LLC
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Filing: 1964-09-15
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Granted: 1966-12-27
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Expires: 1984-09-15
Abstract
No abstract record available.
Inventors
- 👤 Schmitt Joseph Michael
- 👤 Landers Leo Augustine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:16
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; C08L101/00; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08L67/00; C08L69/00; C08L75/00; C08L75/04; C08L77/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A METHOD FOR THE PRODUCTION OF A POLY(TETRAFLUOROETHYLENE) THERMOPLASTIC RESIN MOLDING COMPOSITION WHICH CONSISTS ESSENTIALLY OF BLENDING A NORMALLYRIGID THERMOPLASTIC RESIN SELECTED FROM THE ROUP CONSISTING OF ACRYLATE AND METHACRYLATE POLYMERS, STYRENE POLYMERS, POLYCARBONATES, ALDEHYDE POLYMERS, CELLULOSIC POLYMERS, VINYL HALIDE POLYMERS AND POLYAMIDES WITH A POLY(TETRAFLUOROETHYLENE) LATEX HAVING A SOLIDS CONTENT OF FROM ABOUT 30% TO ABOUT 80%, BY WEIGHT, FOR AT LEAST ABOUT ONE MINUTE WHILE SHEARING THE POLY(TETRO-FLUOBOETHYLENE) INTO FINELY-DIVIDED MICROFIBROUS AND SUBMICROFIBROUS PARTICLES HAVING DIAMERTERS RANGING FROM ABOUT 100 A. TO ABOUT 2 MICRONS AND THEREBY PRODUCING A WELL DISPERSED, SUBSTANTIALLY HOMOGENEOUS MIXTURE OF SAID POLY(TETRAFLUOROETHYLENE) AND SAID THERMOPLASTIC RESIN, AND RECOVERING THE RESULTING MOLDING COMPOSITION BY REMOVING THE VOLATILES CONTAINED IN THE BLENDED RESINS, THE TOTAL AMOUNT OF POLY(TETRAFLUOROETHYLENE) IN THE FINAL MOLDING COMPOSITION RANGING FROM ABOUT 10% TO ABOUT 20%, BY WEIGHT.
Claim 2
Independent Claim
137 words
A METHOD FOR THE PRODUCTION OF A POLY(TETRAFLUOROETHYLENE) THERMOPLASTIC RESIN MOLDING COMPOSITION WHICH CONSISTS ESSENTIALLY OF BLENDING A NORMALLYRIGID THERMOPLASTIC RESIN SELECTED FROM THE ROUP CONSISTING OF ACRYLATE AND METHACRYLATE POLYMERS, STYRENE POLYMERS, POLYCARBONATES, ALDEHYDE POLYMERS, CELLULOSIC POLYMERS, VINYL HALIDE POLYMERS AND POLYAMIDES WITH A POLY(TETRAFLUOROETHYLENE) LATEX HAVING A SOLIDS CONTENT OF FROM ABOUT 30% TO ABOUT 80%, BY WEIGHT, FOR AT LEAST ABOUT ONE MINUTE WHILE SHEARING THE POLY(TETRO-FLUOBOETHYLENE) INTO FINELY-DIVIDED MICROFIBROUS AND SUBMICROFIBROUS PARTICLES HAVING DIAMERTERS RANGING FROM ABOUT 100 A. TO ABOUT 2 MICRONS AND THEREBY PRODUCING A WELL DISPERSED, SUBSTANTIALLY HOMOGENEOUS MIXTURE OF SAID POLY(TETRAFLUOROETHYLENE) AND SAID THERMOPLASTIC RESIN, AND RECOVERING THE RESULTING MOLDING COMPOSITION BY REMOVING THE VOLATILES CONTAINED IN THE BLENDED RESINS, THE TOTAL AMOUNT OF POLY(TETRAFLUOROETHYLENE) IN THE FINAL MOLDING COMPOSITION RANGING FROM ABOUT 10% TO ABOUT 20%, BY WEIGHT.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |