Patent US3389201A successfully refreshed from Google Patents.
US3389201A
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US
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Paste extrusion of polytetrafluoroethylene by prebaking of the coagulated dispersionresin
Assignee: EIDP Inc
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Filing: 1964-07-30
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Granted: 1968-06-18
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Expires: 1984-07-30
Abstract
No abstract record available.
Inventors
- 👤 Richard G Alsup
- 👤 Charles S Cope
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:32
CPC Classifications
B; B29; B29B; B29B11/00; B29B11/06; B29B11/10; B29B13/00; B29B13/007; B29C; B29C48/00; B29C48/022; B29C48/03; B29C48/05; B29C48/07; B29C48/08; B29C48/09; B29K; B29K2027/00; B29K2027/12; B29K2027/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2456621A
Cited
US2931106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |