US4543293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarized, shaped material of copolymer of vinylidene fluoride
Assignee: Kureha Corp
•
Filing: 1983-05-20
•
Granted: 1985-09-24
•
Expires: 2003-05-20
Abstract
Abstract Disclosed is a polarized, shaped material comprising a copolymer of 40 to 87 mol % of vinylidene fluoride, 10 to 40 mol % of trifluoroethylene and 3 to 20 mol % of vinyl fluoride.
Inventors
- 👤 Ken'ichi Nakamura
- 👤 Teruo Sakagami
- 👤 Yoshikichi Teramoto
- 👤 Hiroshi Obara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:53
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/22; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0688; H; H10; H10N; H10N30/00; H10N30/80; H10N30/85; H10N30/857; Y; Y10; Y10S; Y10S310/00; Y10S310/80; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/8305
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
32 words
A polarized, shaped material comprising a copolymer of 40 to 87 mol % of vinylidene fluoride, 10 to 40 mol % of trifluoroethylene and 3 to 20 mol % of vinyl fluoride.
Claim 2
Dependent Claim
32 words
A polarized, shaped material comprising a copolymer of 40 to 87 mol % of vinylidene fluoride, 10 to 40 mol % of trifluoroethylene and 3 to 20 mol % of vinyl fluoride.
Claim 3
Dependent Claim
24 words
A polarized, shaped material according to claim 1, wherein said shaped material shows an electromechanical coupling factor (k t ) of larger than 0.21.
Claim 4
Dependent Claim
24 words
A polarized, shaped material according to claim 2, wherein said shaped material shows an electromechanical coupling factor (k t ) of larger than 0.22.
Claim 5
Dependent Claim
24 words
A polarized, shaped material according to claim 3, wherein said shaped material shows an electromechanical coupling factor (k t ) of larger than 0.23.
Claim 6
Dependent Claim
36 words
A polarized, shaped material according to claim 1, wherein said copolymer comprises 65 to 80 mol % of vinylidene fluoride, 15 to 30 mol % of trifluoroethylene and 5 to 15 mol % of vinyl fluoride.
Claim 7
Dependent Claim
21 words
A polarized, shaped material according to claim 1, wherein said copolymer is a terpolymer of vinylidene fluoride, trifluoroethylene and vinyl fluoride.
Claim 8
Dependent Claim
19 words
A polarized, shaped material according to claim 1, wherein said material additionally contains one or more fluorine containing monomers.
Claim 9
Dependent Claim
18 words
A polarized, shaped material according to claim 7, wherein said fluorine containing monomer is tetrafluoroethylene, hexafluoropropylene, or monochlorotrifluoroethylene.
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) | 1988-09-23 | 1989-03-25 | 1989-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-23 | 1993-03-25 | 1993-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-23 | 1997-03-25 | 1997-09-24 | $7700.00 | Window Closed / Lapsed |