US4405700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode coating composed of copolymers derived from diacetone acrylamide
Assignee: Congress Financial Corp Florida
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Filing: 1981-03-17
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Granted: 1983-09-20
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Expires: 2001-03-17
Abstract
Abstract An improved electrode coating and separator coating derived from a copolymer of diacetone acrylamide and a polymerizable monomer.
Inventors
- 👤 Guy Rampel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:11
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/62; H01M4/24; H01M4/244; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/44; H01M50/46; H01M50/423; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
23 words
In a battery separator, the improvement comprising a separator coating consisting essentially of a copolymer derived from diacetone acrylamide and a polymerizable monomer.
Claim 2
Dependent Claim
23 words
In a battery separator, the improvement comprising a separator coating consisting essentially of a copolymer derived from diacetone acrylamide and a polymerizable monomer.
Claim 3
Dependent Claim
42 words
The separator 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 separator 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 separator 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 separator 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
17 words
The separator of claim 1 wherein said separator is employed in a zinc or cadmium battery cell.
Claim 8
Dependent Claim
20 words
The separator of claim 1 wherein said separator coating comprises from 0.5 to 20% by weight of the separator material.
References Cited (Backward Citations)
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Cited
US2824165A
Cited
US3630781A
Cited
US3918989A
Cited
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Cited
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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) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |