Patents by Inventor Richard H. Dawson

Richard H. Dawson 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).

  • Cell sealant
    Patent number: 5332633
    Abstract: The invention relates to sealant materials for sealing interfacial spaces within electrochemical cells. The sealant material is a thermoplastic block copolymer elastomer characterized by having at least two glass transition temperatures. The thermoplastic block copolymers form particularly useful sealants for a current collector nail which is inserted through an insulating closure member, such as a plastic grommet, used to close the open end of the cell.
    Type: Grant
    Filed: March 16, 1993
    Date of Patent: July 26, 1994
    Assignee: Duracell Inc.
    Inventors: David V. Adamson, Richard H. Dawson