Patents by Inventor Gregory H. C. Stephan

Gregory H. C. Stephan 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).

  • Filter cartridge end cap assembly
    Patent number: 5336405
    Abstract: A filter cartridge is provided with an end cap and a lock ring which capture a filter element therebetween on assembly and which include projections extending beyond the outer surfaces of the end cap and the lock ring. The application of heat to the projections causes the material of the projections to fuse together and provide a leak-proof seal between the end cap, the lock ring and the filter material.
    Type: Grant
    Filed: April 20, 1990
    Date of Patent: August 9, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Yuan-Ming Tang, Gregory H. C. Stephan