US3315020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing biaxially fibrillated sheets
Assignee: Gore Enterprise Holdings Inc
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Filing: 1962-03-21
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Granted: 1967-04-18
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Expires: 1982-03-21
Abstract
No abstract record available.
Inventors
- 👤 Wilbert L Gore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:02
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; B; B29; B29C; B29C48/00; B29C48/022; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/30; B29C48/305; B29K; B29K2027/00; B29K2027/12; B29K2027/18; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/14; C08J2327/18; Y; Y10; Y10S; Y10S264/00; Y10S264/47
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A PROCESS FOR THE FORMATION OF SHEETING FROM A POLYMER OF TETRAFLUOROETHYLENE WHICH PROCESS COMPRISES MIXING PULVERULENT POWDER COMPRISING SAID POLYMER WITH ABOUT 20% TO ABOUT 50% BY VOLUME, BASED ON THE TOTAL VOLUME OF THE RESULTANT MIXTURE, OF A FLUID LUBRICANT WHICH WETS THE SAID POLYMER FORCING THE RESULTANT MASS FROM A CYLINDER THROUGH A FIRST CONSTRICTING ORIFICE TO FORM A ROD-LIKE MASS, THE CROSS-SECTIONAL AREA OF THE CYLINDER DIVIDED BY THE CROSS-SECTIONAL AREA OF THE FIRST CONSTRICTING ORIFICE DEFINING LONGITUDINAL STRETCH RATIO; AND THEN FORCING THE ROD-LIKE MASS THROUGH A SECOND CONSTRICTING ORIFICE TO FORM A FLAT RIBBON-LIKE MASS, THE WIDTH OF THE SECOND ORIFICE DIVIDED BY THE WIDTH OF THE FIRST CONSTRICTING ORIFICE DEFINING LATERAL STRETCH RATIO; THE OVERALL STRETCHING OF THE MASS FROM THE CYLINDER THROUGH THE SECOND CONSTRICTING ORIFICE BEING SUCH THAT THE RATIO OF THE LONGITUDINAL STRETCH RATIO TO THE LATER STRETCH RATIO IS 1.4$0.30.
Claim 2
Dependent Claim
151 words
A PROCESS FOR THE FORMATION OF SHEETING FROM A POLYMER OF TETRAFLUOROETHYLENE WHICH PROCESS COMPRISES MIXING PULVERULENT POWDER COMPRISING SAID POLYMER WITH ABOUT 20% TO ABOUT 50% BY VOLUME, BASED ON THE TOTAL VOLUME OF THE RESULTANT MIXTURE, OF A FLUID LUBRICANT WHICH WETS THE SAID POLYMER FORCING THE RESULTANT MASS FROM A CYLINDER THROUGH A FIRST CONSTRICTING ORIFICE TO FORM A ROD-LIKE MASS, THE CROSS-SECTIONAL AREA OF THE CYLINDER DIVIDED BY THE CROSS-SECTIONAL AREA OF THE FIRST CONSTRICTING ORIFICE DEFINING LONGITUDINAL STRETCH RATIO; AND THEN FORCING THE ROD-LIKE MASS THROUGH A SECOND CONSTRICTING ORIFICE TO FORM A FLAT RIBBON-LIKE MASS, THE WIDTH OF THE SECOND ORIFICE DIVIDED BY THE WIDTH OF THE FIRST CONSTRICTING ORIFICE DEFINING LATERAL STRETCH RATIO; THE OVERALL STRETCHING OF THE MASS FROM THE CYLINDER THROUGH THE SECOND CONSTRICTING ORIFICE BEING SUCH THAT THE RATIO OF THE LONGITUDINAL STRETCH RATIO TO THE LATER STRETCH RATIO IS 1.4$0.30.
References Cited (Backward Citations)
GB708025A
Cited
US2685707A
Cited
US2752637A
Cited
US2957791A
Cited
US2832713A
Cited
US2915786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |