US4379858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamed plastics
Assignee: Individual
•
Filing: 1982-08-23
•
Granted: 1983-04-12
•
Expires: 2002-08-23
Abstract
Abstract A melt-molded foamed plastic composition comprised of a tetrafluoroethylene-perfluoroalkyl vinyl ether resin matrix in which is admixed stretched porous fragments of polytetrafluoroethylene.
Inventors
- 👤 Hirosuke Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:35
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J9/04; C08J9/12; C08J9/122; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18; C08J2423/00; C08J2427/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A melt molded foamed plastic composition comprising a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin matrix and stretched porous resin fragments selected from the group consisting of polytetrafluoroethylene, polyethylene and polypropylene wherein said porous fragments have a porosity of 40 to 90%.
Claim 2
Dependent Claim
40 words
A melt molded foamed plastic composition comprising a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin matrix and stretched porous resin fragments selected from the group consisting of polytetrafluoroethylene, polyethylene and polypropylene wherein said porous fragments have a porosity of 40 to 90%.
References Cited (Backward Citations)
US2806509A
Cited
US3296153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-11 | 1986-10-11 | 1987-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-11 | 1990-10-11 | 1991-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-11 | 1994-10-11 | 1995-04-12 | $7700.00 | Window Closed / Lapsed |