US4985308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amorphous copolymers of perfluoro-2,2-dimethyl-1,3-dioxole
Assignee: EIDP Inc
•
Filing: 1990-04-09
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Granted: 1991-01-15
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Expires: 2010-04-09
Abstract
Abstract Articles made from amorphous dipolymers of perfluoro-2,2-dimethyl-1,3-dioxole with tetrafluoroethylene having high glass transition temperatures of 140° C. or higher, low indices of refraction, and good physical properties, and low dielectric constants, include, among others, substrates for circuit boards, composites, sheets and films, optical lenses, and electronic current carrying devices.
Inventors
- 👤 Edward N. Squire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:11
CPC Classifications
C; C08; C08F; C08F234/00; C08F234/02; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/034; H05K3/00; H05K3/22; H05K3/28; H05K3/285; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A metallic sheet or foil having on at least one face thereof a coating of an amorphous dipolymer of 65-99 mole % of perfluoro-2,2-dimethyl-1,3-dioxole with a complementary amount of tetraflrouroethylene, the glass transition temperature of the dipolymer being at least 140° C.
Claim 2
Dependent Claim
42 words
A metallic sheet or foil having on at least one face thereof a coating of an amorphous dipolymer of 65-99 mole % of perfluoro-2,2-dimethyl-1,3-dioxole with a complementary amount of tetraflrouroethylene, the glass transition temperature of the dipolymer being at least 140° C.
References Cited (Backward Citations)
CA835589A
Cited
US2468664A
Cited
US3978030A
Cited
US3969285A
Cited
US4059469A
Cited
US4173033A
Cited
US4362785A
Cited
JPS5572025A
Cited
US4420225A
Cited
US4530569A
Cited
US4543294A
Cited
US4640866A
Cited
US4758067A
Cited
US4720428A
Cited
US4620262A
Cited
US4617350A
Cited
US4680220A
Cited
US4747662A
Cited
US4756599A
Cited
US4743480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |