Patents by Inventor Charles Grantom

Charles Grantom 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).

  • Well sealing apparatus and method
    Patent number: 4930577
    Abstract: A well sealing apparatus, and method of use, which seals between tubular goods and a well casing without the use of a sealing tool run separately. The apparatus has a resilient skirt which is sealed against the well casing by split rings which are released from containment by the assembly as the assembly is released from the drill pipe.
    Type: Grant
    Filed: May 5, 1989
    Date of Patent: June 5, 1990
    Inventor: Charles Grantom