U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Method of making a rechargable modified manganese dioxide material and related compound and electrode material

Patent 5156934 Issued on October 20, 1992. Estimated Expiration Date: Icon_subject February 11, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

1293463

3533740

3535217

3773916

Oxygen electrode and process for making the same
Patent #: 3948684
Issued on: 04/06/1976
Inventor: Armstrong

Process for making manganese dioxide
Patent #: 4006217
Issued on: 02/01/1977
Inventor: Faber ,   et al.

2-(3-Substituted amino-2-hydroxypropoxy)-3-substituted pyrazines
Patent #: 4042586
Issued on: 08/16/1977
Inventor: Wasson ,   et al.

Process for producing electrolytic MnO2 from molten manganese nitrate hexahydrate
Patent #: 4048027
Issued on: 09/13/1977
Inventor: Senderoff

Process for producing a positive electrode for a non-aqueous cell
Patent #: 4133856
Issued on: 01/09/1979
Inventor: Ikeda ,   et al.

Production of electrolytic manganese dioxide
Patent #: 4170527
Issued on: 10/09/1979
Inventor: Beer ,   et al.

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Inventors

Assignee

Application

No. 653791 filed on 02/11/1991

US Classes:

429/224, Manganese component is active material252/182.1, HAVING UTILITY AS A REACTIVE MATERIAL IN AN ELECTROCHEMICAL CELL; E.G., BATTERY, ETC.423/605Group VIIB metal (Mn, Tc, or Re)

Examiners

Primary: Hearn, Brian E.
Assistant: Nuzzolillo, M.

Attorney, Agent or Firm

Foreign Patent References

  • 138316 EP. 07/12/1984

International Class

H01M 004/04

Abstract

A method of making a rechargeable modified manganese dioxide material for use as battery electrode is disclosed. The method includes mixing manganese dioxide with an aqueous solution of a water soluble salt component selected from the group consisting of bismuth nitrate, lead acetate, lead nitrate, copper sulfate, copper nitrate, copper chloride and mixtures thereof. An alkaline hydroxide solution is then added to establish precipitation of resultant product. The resultant product is washed, filtered and dried to obtain the modified manganese dioxide material. The material is combined with a suitable conducting reinforcement component and a binder to form a high density, low resistivity electrode material.

Other References

  • Kordesch et al., "Electrochemcia Acta." 26 (1495) (1981)
  • Wroblowa, et al., "Journal of Electroanalytic Chemistry," 238, 93 (1987
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