US5019467A
Expired / Lapsed
US
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Thin primary cell
Assignee: Kimoto Co Ltd
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Filing: 1989-07-10
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Granted: 1991-05-28
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Expires: 2009-07-10
Abstract
Abstract A thin primary cell formed with a combination of a positive current collection layer, a positive active layer, a solid polyelectrolyte layer and a thin metallic film layer which are successively laminated onto an insulating material. Since this thin primary cell employs a solid polyelectrolyte as an electrolyte, it is not only free from liquid leakage but also formable on a film or sheet.
Inventors
- 👤 Yasuo Fujiwara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:29
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/18; H01M6/181; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/49115
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
167 words
A thin primary cell, in the form of at least one ply of a flexible film of a thickness sufficiently thin to allow the film to be cut by scissors to a length providing a selected size and capacity, said film having a thickness of not more than 0.10 mm and consisting of the following layers, in succession: a positive current collection layer composed of a first polymer and a particulate conductive material selected from the group consisting of carbon grains, carbon fibers, graphite and metallic oxides dispersed in a matrix of said first polymer and having a thickness of 0.1-20 μm; a positive active layer consisting essentially of a particulate manganese dioxide dispersed in a second polymer and having a thickness of 0.1-20 μm; a solid polyelectrolyte layer composed of a matrix of a non-crystalline polymer and an alkali metal salt dispersed in said non-crystalline polymeric matrix and having a thickness of 0.1-10 μm; and a thin metallic film layer having a thickness of 1-50 μm.
Claim 2
Dependent Claim
167 words
A thin primary cell, in the form of at least one ply of a flexible film of a thickness sufficiently thin to allow the film to be cut by scissors to a length providing a selected size and capacity, said film having a thickness of not more than 0.10 mm and consisting of the following layers, in succession: a positive current collection layer composed of a first polymer and a particulate conductive material selected from the group consisting of carbon grains, carbon fibers, graphite and metallic oxides dispersed in a matrix of said first polymer and having a thickness of 0.1-20 μm; a positive active layer consisting essentially of a particulate manganese dioxide dispersed in a second polymer and having a thickness of 0.1-20 μm; a solid polyelectrolyte layer composed of a matrix of a non-crystalline polymer and an alkali metal salt dispersed in said non-crystalline polymeric matrix and having a thickness of 0.1-10 μm; and a thin metallic film layer having a thickness of 1-50 μm.
Claim 3
Dependent Claim
25 words
A thin primary cell as claimed in claim 1, wherein said positive current collection layer is composed of a metallix oxide and said first polymer.
Claim 4
Dependent Claim
18 words
A thin primary cell as claimed in claim 1, wherein said alkali metal salt is a lithium salt.
Claim 5
Dependent Claim
31 words
The thin primary cell of claim 1 wherein said non-crystalline polymer is a polymer whose glass point is less than 10° C. and which has active molecular motion at room temperature.
Claim 6
Dependent Claim
38 words
The thin primary cell of claim 1 wherein said non-crystalline polymer is selected from the group consisting of polyethylene oxide (PEO), polymethoxy polyethylene glycol methacrylate, polyvinyl pyridine, polysiloxane, polypropylene oxide, segmented polyurethane, urea-polyurethane, polyphosphazene, cellulose, polystyrene and polypeptide.
Claim 7
Dependent Claim
107 words
The thin primary cell of claim 1 formed by the process comprising the steps of, in succession: coating said substrate with a liquid blend of said first polymer and said particulate conductive material to form said positive current collection layer; coating said positive current collection layer with a liquid blend of said particulate manganese dioxide and said second polymer to form said positive active layer; coating said positive active layer with a liquid blend of said non-crystalline polymer and said alkali metal salt to form said solid polyelectrolyte layer; and coating said solid polyelectrolyte layer with said metallic film by vacuum deposition, sputtering, ion-plating or non-electrolytic plating.
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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) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |