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US5087641A
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US
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Porous polytetrafluoroethylene resin material
Assignee: Individual
•
Filing: 1990-08-31
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Granted: 1992-02-11
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Expires: 2010-08-31
Abstract
Abstract A porous polytetrafluoroethylene resin material which comprises sintered or irradiated fluororesin powder inside the porous spaces of a continuously porous polytetrafluoroethylene resin base material.
Inventors
- 👤 Yoshiaki Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:24
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/40; C08J9/42; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/443; H01B3/445; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18; C08J2427/00; Y; Y10; Y10S; Y10S521/00; Y10S521/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A porous polytetrafluoroethylene resin material which comprises sintered or irradiated fluororesin powder inside the porous spaces of a continuously porous polytetrafluoroethylene resin base material.
Claim 2
Dependent Claim
24 words
A porous polytetrafluoroethylene resin material which comprises sintered or irradiated fluororesin powder inside the porous spaces of a continuously porous polytetrafluoroethylene resin base material.
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) | 1995-02-10 | 1995-08-12 | 1996-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-10 | 1999-08-12 | 2000-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-10 | 2003-08-12 | 2004-02-11 | $7700.00 | Window Closed / Lapsed |