US4454249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced plastics with porous resin fragments
Assignee: Junkosha Co Ltd
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Filing: 1982-08-23
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Granted: 1984-06-12
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Expires: 2002-08-23
Abstract
Abstract Reinforced easily moldable plastics are provided wherein particles of stretched porous polymer are incorporated into a plastic molding resin material to improve its physical properties without detracting from moldability. Particles or fragments of porous stretched forms of polyethylene, polypropylene, or polytetrafluoroethylene, are incorporated into a matrix of polytetrafluoroethylene polyvinylidene fluoride, or a copolymer of tetrafluoroethylene with perfluoroalkyl vinyl ether, hexafluoropropylene, ethylene, or trifluorochloroethylene.
Inventors
- 👤 Hirosuke Suzuki
- 👤 Chiaki Mizukami
- 👤 Yoshiaki Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:11
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J11/00; C08J11/04; C08J11/06; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; C08J2327/00; C08J2327/02; C08J2327/12; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
35 words
Reinforced plastic compositions which comprise a fluoroplastic resin matrix selected from the group consisting of polytetrafluoroethylene, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene-hexfluoropropylene copolymer, tetrafluoroethylene-ethylene copolymer, polytrifluorochloroethylene and polyvinylidene fluoride, and stretched polytetrafluoroethylene resin fragments mixed thereinto.
Claim 2
Dependent Claim
35 words
Reinforced plastic compositions which comprise a fluoroplastic resin matrix selected from the group consisting of polytetrafluoroethylene, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene-hexfluoropropylene copolymer, tetrafluoroethylene-ethylene copolymer, polytrifluorochloroethylene and polyvinylidene fluoride, and stretched polytetrafluoroethylene resin fragments mixed thereinto.
Claim 3
Dependent Claim
22 words
A reinforced plastic composition of claim 1 in which the stretched porous resin fragments are fragments of a stretched porous resin film.
Claim 4
Dependent Claim
28 words
Reinforced plastic compositions of claim 1, in which the stretched porous resin fragments are stretched polytetrafluoroethylene resin fragments which have not been sintered or have been sintered incompletely.
Claim 5
Dependent Claim
28 words
Reinforced plastic compositions of claims 2 in which the stretched porous resin fragments are stretched polytetrafluoroethylene resin fragments which have not been sintered or have been sintered incompletely.
Claim 6
Dependent Claim
19 words
Reinforced plastic compositions of claims 1, 2, 3 or 4 in which the resin matrix is stretched polytetrafluoroethylene resin.
Claim 7
Dependent Claim
22 words
Reinforced plastic resin compositions of claims 1, 2, 3 or 4, in which the resin matrix is stretched partially sintered polytetrafluoroethylene resin.
Claim 8
Dependent Claim
19 words
Reinforced plastic compositions of claims 1, 2, 3 or 4, in which the resin matrix is stretched sintered polytetrafluoroethylene.
References Cited (Backward Citations)
US2998397A
Cited
US3005795A
Cited
US3019206A
Cited
US3294871A
Cited
US4334037A
Cited
US4387168A
Cited
US4379858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |