Patents by Inventor Victor Filippovich Cherstokov

Victor Filippovich Cherstokov 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).

  • Process for producing bisthiophenolperfluoroalkylidene compound
    Patent number: 5998564
    Abstract: 2.2'-bis(3-mercaptophenyl)hexafluoropropane [bisthio-phenol AF] is obtained in good yield by chlorosulfonating 2.2'-bisphenylhexafluoropropane and reducing the thus quantitatively obtained 2,2'-bis(3-chlorosulfonylphenyl)-hexafluoropropane with zinc under acidic conditions and is effectively used as a cross-linking agent for a fluorine-containing elastomer having halogenophenyl groups as cross-linkable groups.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: December 7, 1999
    Assignee: Nippon Mektron, Limited
    Inventors: Takehiro Sonoi, Haruyoshi Tatsu, Satoru Saito, Sergei Rafailovich Sterlin, Victor Filippovich Cherstokov, Nina Ivanovna Delyagina
  • Crosslinkable composition of fluoroelastomer and bisthiophenolperfluoroalkylidene
    Patent number: 5891964
    Abstract: 2,2 bis(3-mercaptophenyl)hexafluoropropane ?bisthiophenol AF! is obtained in good yield by chlorosulfonating 2,2'-bisphenylhexafluoropropane and reducing the thus quantitatively obtained 2,2'-bis(3-chlorosulfonylphenyl)hexafluoropropane with zinc under acidic conditions and is effectively used as a cross-linking agent for a fluorine-containing elastomer having halogenophenyl groups as cross-linkable groups.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: April 6, 1999
    Assignee: Nippon Mektron, Limited
    Inventors: Takehiro Sonoi, Haruyoshi Tatsu, Satoru Saito, Sergei Rafailovich Sterlin, Victor Filippovich Cherstokov, Nina Ivanovna Delyagina