US4469579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid polymer electrolytes and electrode bonded with hydrophylic fluorocopolymers
Assignee: Diamond Shamrock Chemicals Co
•
Filing: 1982-09-20
•
Granted: 1984-09-04
•
Expires: 2002-09-20
Abstract
Abstract A solid polymer electrolyte (SPE), solid polymer electrolyte electrode, and method for forming from cationic exchange perfluorocarbon copolymer. Disclosed are solution techniques for forming SPE's and SPE electrodes using fluorocarbon vinyl ether copolymers.
Inventors
- 👤 Michael J. Covitch
- 👤 Donald L. DeRespiris
- 👤 Leo L. Benezra
- 👤 Elvin M. Vauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:48
CPC Classifications
C; C25; C25B; C25B13/00; C25B9/00; C25B9/17; C25B9/19; C25B9/23
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
148 words
A solid polymer electrolyte electrode assembly comprising: a perfluorocarbon copolymeric membrane comprising two zones each having functional groups with the groups differing from one zone to the other; a hydrophylic perfluorocarbon copolymer composite anode prepared from a dispersion of conductive particulate substance and hydrophylic perfluorocarbon copolymer dispersed in solvating dispersion medium, said anode being coadhered to one membrane surface and consisting essentially of said conductive particulate substance partially coated with the hydrophylic perfluorocarbon copolymer, said copolymer having equivalent weight between about 900 and 1500; and a hydrophylic perfluorocarbon copolymer composite cathode prepared from a dispersion of particulate electrocatalytic compound and hydrophylic perfluorocarbon copolymer dispersed in solvating dispersion medium, said cathode being coadhered to the surface of the membrane obverse from said anode, said cathode consisting essentially of said particulate electrocatalytic compound partially coated with the hydrophylic perfluorocarbon copolymer, said copolymer having equivalent weight between about 900 and 1500.
Claim 2
Dependent Claim
148 words
A solid polymer electrolyte electrode assembly comprising: a perfluorocarbon copolymeric membrane comprising two zones each having functional groups with the groups differing from one zone to the other; a hydrophylic perfluorocarbon copolymer composite anode prepared from a dispersion of conductive particulate substance and hydrophylic perfluorocarbon copolymer dispersed in solvating dispersion medium, said anode being coadhered to one membrane surface and consisting essentially of said conductive particulate substance partially coated with the hydrophylic perfluorocarbon copolymer, said copolymer having equivalent weight between about 900 and 1500; and a hydrophylic perfluorocarbon copolymer composite cathode prepared from a dispersion of particulate electrocatalytic compound and hydrophylic perfluorocarbon copolymer dispersed in solvating dispersion medium, said cathode being coadhered to the surface of the membrane obverse from said anode, said cathode consisting essentially of said particulate electrocatalytic compound partially coated with the hydrophylic perfluorocarbon copolymer, said copolymer having equivalent weight between about 900 and 1500.
Claim 3
Dependent Claim
33 words
The assembly of claim 1 wherein said membrane comprises one zone of copolymeric perfluorocarbon containing pendant sulfonyl based functional groups and a second zone of copolymeric perfluorocarbon containing pendant carbonyl based functional groups.
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) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |