Patents by Inventor Derek K. Schwendener

Derek K. Schwendener 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).

  • Vent plugs for electric storage batteries
    Patent number: 4315058
    Abstract: A vent plug includes a thermophastic tubular body for insertion in an aperture in the lid of a battery. The vent plug has at its upper end an integral lid with a gas venting aperture formed therein. A removable insert is secured within the tubular body and defines a tortuous gas venting path. The insert and the body are constructed to define a space with which the gas venting aperture and the gas venting path communicate, the space accommodating a porous flame retarding body.
    Type: Grant
    Filed: May 6, 1980
    Date of Patent: February 9, 1982
    Assignee: Chloride Group Limited
    Inventors: Derek K. Schwendener, Neil L. Ainsworth, Richard J. Foss