Patent US2752637A successfully refreshed from Google Patents.
US2752637A
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Extrusion of polytetrafluoroethylene
Assignee: Resistoflex Corp
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Filing: 1954-07-01
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Granted: 1956-07-03
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Expires: 1974-07-01
Abstract
No abstract record available.
Inventors
- 👤 Benjamin M Walker
- 👤 Jr Leland W Van Denburgh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:20
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; B; B29; B29C; B29C48/00; B29C48/022; B29C48/03; B29C48/09; B29K; B29K2027/00; B29K2027/12; B29K2027/18; Y; Y10; Y10S; Y10S138/00; Y10S138/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
THE METHOD OF EXTRUDING ARTICLES FROM A PASTE COMPRISING FINELY DIVIDED POLYTETRAFLUOROETHYLENE AND A VOLATILE LUBRICANT WHICH COMPRISES DISTRIBUTING THROUGHOUT SAID PASTE FROM 0.01% TO ABOUT 5% BY WEIGHT OF CARBON BLACK, BASED ON THE WEIGHT OF THE POLYTETRAFLUOROETHYLENE, AND THEREAFTER EXTRUDING SAID PASTE THROUGH AN ORIFICE.
Claim 2
Independent Claim
47 words
THE METHOD OF EXTRUDING ARTICLES FROM A PASTE COMPRISING FINELY DIVIDED POLYTETRAFLUOROETHYLENE AND A VOLATILE LUBRICANT WHICH COMPRISES DISTRIBUTING THROUGHOUT SAID PASTE FROM 0.01% TO ABOUT 5% BY WEIGHT OF CARBON BLACK, BASED ON THE WEIGHT OF THE POLYTETRAFLUOROETHYLENE, AND THEREAFTER EXTRUDING SAID PASTE THROUGH AN ORIFICE.
References Cited (Backward Citations)
US2644802A
Cited
US2685707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-03 | 1960-01-02 | 1960-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-03 | 1964-01-02 | 1964-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-03 | 1968-01-02 | 1968-07-03 | $7700.00 | Window Closed / Lapsed |