Patents by Inventor Henry R. Lifferth

Henry R. Lifferth 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).

  • Seal having fluent packing material
    Patent number: 4050700
    Abstract: A seal made of one or more formed sealant receiving grooves, a fitting connected into the groove or grooves to allow sealant to be injected therethrough and a sealant material that can be injected through the fitting into the groove or grooves and that will retain its fluid characteristics while remaining in its assigned position.
    Type: Grant
    Filed: October 6, 1975
    Date of Patent: September 27, 1977
    Inventor: Henry R. Lifferth