Patent US4610484A successfully refreshed from Google Patents.
Patent US4401737A successfully refreshed from Google Patents.
US4401737A
Expired / Lapsed
US
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Protective active nitrides as additives to nonaqueous cathode materials
Assignee: Spectrum Brands Inc
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Filing: 1981-08-10
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Granted: 1983-08-30
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Expires: 2001-08-10
Abstract
Abstract A method for preparing stable non-stoichiometric cathode material to provide cathodes useful in non-aqueous electrochemical cells having an active metal (e.g. lithium) anode. The method comprises reducing the non-stoichiometric cathode material (e.g. manganese dioxide) with the active metal or a precursor compound of said active metal to form a compound of the active metal and stoichiometric active cathode material.
Inventors
- 👤 Ashok V. Joshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:42
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/483; H01M4/50; H01M4/502; H01M4/58; H01M4/581; H01M4/5815; H01M6/00; H01M6/14; H01M6/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
54 words
A stabilized cathode for use in a non-aqueous electrochemical cell having an active metal as the anode comprising on a mole basis a predominate amount of a stoichiometric cathode active material in intimate contact with an in-situ produced compound of said active metal and chemical species resulting from chemical reduction of cathode active material.
Claim 2
Dependent Claim
54 words
A stabilized cathode for use in a non-aqueous electrochemical cell having an active metal as the anode comprising on a mole basis a predominate amount of a stoichiometric cathode active material in intimate contact with an in-situ produced compound of said active metal and chemical species resulting from chemical reduction of cathode active material.
Claim 3
Dependent Claim
30 words
A cathode as in claim 1 wherein said cathode active material is selected from the group of MnO 2 , FeS, WO 3 , TiS 2 and CrO 3 .
Claim 4
Dependent Claim
17 words
A cathode as in claim 1 wherein said compound of said active metal is a lithium compound.
Claim 5
Dependent Claim
14 words
A cathode as in claim 3 wherein the cathode active material is iron sulfide.
Claim 6
Dependent Claim
14 words
A cathode as in claim 3 wherein the cathode active material is manganese dioxide.
References Cited (Backward Citations)
US4246253A
Cited
US4297231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |