Patents by Inventor Gerrard A. Birchall

Gerrard A. Birchall 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).

  • Biocide
    Patent number: 4539071
    Abstract: This invention relates to the elimination of bacterial deposits in cooling water systems and in water systems used in paper making. This is achieved by using a combination of glutaraldehyde and isothiazolone.
    Type: Grant
    Filed: April 18, 1983
    Date of Patent: September 3, 1985
    Assignee: Dearborn Chemicals Limited
    Inventors: Richard P. Clifford, Gerrard A. Birchall