Patent US4160747A successfully refreshed from Google Patents.
US4160747A
Expired / Lapsed
US
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Electrode and manufacturing method therefor
Assignee: VARTA Batterie AG
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Filing: 1978-01-27
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Granted: 1979-07-10
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Expires: 1998-01-27
Abstract
Abstract An electrode for a primary cell is produced by first mixing a solid depolarizer, carbon, and a water-insoluble organic polymer binder. The mixture is then molded into an electrode body. The binder is in the mixture in the form of a dispersion in a hydrophilic medium.
Inventors
- 👤 Gerhard Schneider
- 👤 Werner Riedl
- 👤 Hans-Martin Lippold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:45
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/06; H01M4/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A method of manufacturing a positive electrode body for a primary cell with alkaline electrolyte comprising the steps of forming a first mixture of manganese dioxide, and graphite in proportions of active mass and conductive material for the mass, respectively; forming a dispersion in water only of polyisobutylene; forming a second mixture of the first mixture and the dispersion; and molding the second mixture into the positive electrode body.
Claim 2
Independent Claim
69 words
A method of manufacturing a positive electrode body for a primary cell with alkaline electrolyte comprising the steps of forming a first mixture of manganese dioxide, and graphite in proportions of active mass and conductive material for the mass, respectively; forming a dispersion in water only of polyisobutylene; forming a second mixture of the first mixture and the dispersion; and molding the second mixture into the positive electrode body.
Claim 3
Dependent Claim
12 words
The method of claim 1, in which the second mixture is compressed.
Claim 4
Dependent Claim
16 words
The method of claim 2, in which the second mixture is dried before it is compressed.
Claim 5
Dependent Claim
20 words
The method of claim 1, in which the dispersion contains from about 3% to 60% by weight of the polyisobutylene.
Claim 6
Dependent Claim
20 words
The method of claim 4, in which the dispersion contains from about 5 to 25% by weight of the polyisobutylene.
Claim 7
Dependent Claim
43 words
The method of claim 1, in which the dispersion is present in the second mixture in an amount sufficient to produce a mass containing between about 0.5% and 5% by weight of the polyisobutylene and about 1 to 10% by weight of water.
Claim 8
Dependent Claim
20 words
The method of claim 6, in which the mass contains from about 0.5% to 2% by weight of the polyisobutylene.
Claim 9
Dependent Claim
43 words
A positive electrode body for a primary cell with alkaline electrolyte produced by a method which includes the steps of forming a mixture of manganese dioxide, graphite and a dispersion in water only of polyisobutylene; and forming the mixture into the electrode body.
Claim 10
Dependent Claim
43 words
A positive electrode body for a primary cell with alkaline electrolyte produced by a method which includes the steps of forming a mixture of manganese dioxide, graphite and a dispersion in water only of polyisobutylene; and forming the mixture into the electrode body.
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) | 1982-07-09 | 1983-01-08 | 1983-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-09 | 1987-01-08 | 1987-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-09 | 1991-01-08 | 1991-07-10 | $7700.00 | Window Closed / Lapsed |