Patents by Inventor Donn D. Lobdell

Donn D. Lobdell 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).

  • Edge sealed pleated membrane
    Patent number: 4163721
    Abstract: A fluid flow transfer apparatus comprising a pleated membrane and a housing having a pair of generally U-shaped interfitting casings. One of the casings fits within the other to define a central fluid chamber in which the membrane is positioned and a pair of outer sealing compartments. The two outermost flaps of the membrane extend into the respective sealing compartments, where they are sealed to the housing.
    Type: Grant
    Filed: May 15, 1978
    Date of Patent: August 7, 1979
    Assignee: Cobe Laboratories, Inc.
    Inventor: Donn D. Lobdell