Patent US3413276A successfully refreshed from Google Patents.
US3413276A
Expired / Lapsed
US
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Polytetrafluoroethylene fine powders with a high degree of internal stress
Assignee: Zeneca Inc
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Filing: 1964-05-25
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Granted: 1968-11-26
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Expires: 1984-05-25
Abstract
No abstract record available.
Inventors
- 👤 Hoashi Juzaemon
- 👤 Matsuura Akira
- 👤 Koizumi Shun
- 👤 Horiuchi Norio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:46
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3009892A
Cited
US3265679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |