Patents by Inventor Brajendra P. Varma

Brajendra P. Varma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4317872
    Abstract: This invention is directed to a lead-acid battery utilizing a novel electrolyte which includes a silica component. The silica component includes silica particles, means for repelling the particles from each other and for catalyzing the formation of siloxane cross-linkages and a sulfuric acid component. The lead-acid battery includes a container, a plurality of electrodes substantially enclosed by the container, and an electrolyte in substantial physical contact with the plurality of electrodes.A novel separator material having a silicate component for use in a lead-acid battery is also included in this invention. The separator material includes a silicate component integrally mixed with an oxygen compound of boron forming a microfiber mat. The mat has a pore size between about 0.5 to 10 microns in diameter and an electrical resistance of about 0.01 ohms per square inch for a 0.05 inch thickness.
    Type: Grant
    Filed: April 25, 1980
    Date of Patent: March 2, 1982
    Assignee: Gould Inc.
    Inventor: Brajendra P. Varma
  • Patent number: 4295940
    Abstract: A manganese or chromium doped positive plate for a lead acid battery, and a method of manufacturing the same is disclosed. Also disclosed is a lead acid battery containing manganese or chromium in the electrolyte. The doped positive plate has increased cycle life, hardness, and resistance to shedding of the active material.
    Type: Grant
    Filed: August 29, 1980
    Date of Patent: October 20, 1981
    Assignee: Eltra Corporation
    Inventor: Brajendra P. Varma
  • Patent number: 4230779
    Abstract: A manganese or chromium doped positive plate for a lead acid battery, and a method of manufacturing the same is disclosed. Also disclosed is a lead acid battery containing manganese or chromium in the electrolyte. The doped positive plate has increased cycle life, hardness, and resistance to shedding of the active material.
    Type: Grant
    Filed: August 7, 1979
    Date of Patent: October 28, 1980
    Assignee: Eltra Corporation
    Inventor: Brajendra P. Varma