Patent US4530890A successfully refreshed from Google Patents.
US4530890A
Expired / Lapsed
US
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Electrode coating composed of copolymers derived from diacetone acrylamide
Assignee: Congress Financial Corp Florida
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Filing: 1983-08-22
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Granted: 1985-07-23
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Expires: 2003-08-22
Abstract
Abstract An improved electrode coating and separator coating derived from a copolymer of diacetone acrylamide and a polymerizable monomer. This invention relates to novel rechargeable electrodes, separators and processes for preparing same.
Inventors
- 👤 Guy Rampel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:16
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/62; H01M4/24; H01M4/244; H01M50/00; H01M50/40; H01M50/409; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
22 words
An electrode comprising a substrate, a finely divided active electrode material, and a copolymer derived from diacetone acrylamide and a polymerizable monomer.
Claim 2
Dependent Claim
22 words
An electrode comprising a substrate, a finely divided active electrode material, and a copolymer derived from diacetone acrylamide and a polymerizable monomer.
Claim 3
Dependent Claim
42 words
The electrode of claim 1 wherein said polymerizable monomer is selected from acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid, styrene, methyl methacrylate, vinyl acetate, vinyl chloride, maleic anhydride, vinyl stearate, ethyl vinyl ether, N-vinylpyrrolidone, vinylidene chloride, acrylonitrile, methyl vinyl ketone, methacrylic acid, acrylamide or butadiene.
Claim 4
Dependent Claim
36 words
The electrode of claim 2 wherein said copolymer is a linear, high molecular weight copolymer derived from diacetone acrylamide and acrylic acid, the molecular weight ratio of said monomers being about 1 to about 0.5, respectively.
Claim 5
Dependent Claim
22 words
The electrode of claim 2 wherein said copolymer is a linear, high molecular weight copolymer derived from diacetone acrylamide and methacrylic acid.
Claim 6
Dependent Claim
22 words
The electrode of claim 2 wherein said copolymer is a linear, high molecular weight copolymer derived from diacetone acrylamide and 2-acrylamide-2-methyl-propanesulfonic acid.
Claim 7
Dependent Claim
21 words
The electrode of claim 1 comprised of zinc or cadmium and, respectively, a finely divided active zinc or cadmium electrode material.
Claim 8
Dependent Claim
17 words
The electrode of claim 1 wherein said copolymer comprises from about 0.5 to about 5% by weight.
Claim 9
Dependent Claim
19 words
The electrode of claim 1 wherein said copolymer comprises from 1 to about 5% by weight of said electrode.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-22 | 1989-01-21 | 1989-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-22 | 1993-01-21 | 1993-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-22 | 1997-01-21 | 1997-07-23 | $7700.00 | Window Closed / Lapsed |