Patents by Inventor Charles J. Korpics

Charles J. Korpics 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).

  • Phenolic resin coated proppants with reduced hydraulic fluid interaction
    Patent number: 5218038
    Abstract: The invention relates to the modification of a curable phenolic resin system by the incorporation of alkylphenol, alkoxyphenol, arylphenol or aryloxyphenol. The resulting resin has reduced water soluble leachates which, in turn, improves the break time when the resin is used to coat proppants for treating subterranean formations.
    Type: Grant
    Filed: November 14, 1991
    Date of Patent: June 8, 1993
    Assignee: Borden, Inc.
    Inventors: Calvin R. Johnson, Kwok-tuen Tse, Charles J. Korpics
  • Process for removing flow-restricting materials from wells
    Patent number: 4848470
    Abstract: An improved process for removing from a wellbore in a subterranean formation particulate material bonded together by a cured phenolic resin. The material is contacted with a solvent composition comprising a liquid selected from the groups: N,N-dimethylformamide, N-methyl-2-pyrrolidone and mixtures thereof for a sufficient time to separate the particulate material and then the separated material is removed from the wellbore.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: July 18, 1989
    Assignee: Acme Resin Corporation
    Inventor: Charles J. Korpics