Patents by Inventor Ivan Christoff Popoff

Ivan Christoff Popoff 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).

  • Non-blooming accelerator and process for vulcanization of EPDM elastomers
    Patent number: 4118378
    Abstract: Thiuram Sulfides of oxazolidines and thiazolidines are disclosed herein and shown to be useful as non-blooming accelerators in the vulcanization of ethylene-propylene-diene-terpolymers.
    Type: Grant
    Filed: September 30, 1977
    Date of Patent: October 3, 1978
    Assignee: Pennwalt Corporation
    Inventors: Ivan Christoff Popoff, Everett A. Mailey, Paul Gordon Haines
  • Polymer of 1,2,4-thiadiazole and lubricants containing it as an additive
    Patent number: 4107059
    Abstract: The Polymer of 1,2,4-thiadiazole of the structure ##STR1## AND LUBRICANTS CONTAINING SAID POLYMER ARE PROVIDED.
    Type: Grant
    Filed: June 27, 1977
    Date of Patent: August 15, 1978
    Assignee: Pennwalt Corporation
    Inventors: James Ping King, Everett A. Mailey, Ivan Christoff Popoff
  • Microencapsulated vulcanizing agents
    Patent number: 4102800
    Abstract: Alkylated phenol sulfide contained within microcapsules, in which the capsule wall is crosslinked polyamide, polyurea, or polyamide-polyurea resin, is a better-handling, more efficient vulcanizing agent for rubber.
    Type: Grant
    Filed: October 1, 1973
    Date of Patent: July 25, 1978
    Assignee: Pennwalt Corporation
    Inventors: Ivan Christoff Popoff, Chester Blair DeSavigny
  • Non-blooming accelerator and process for vulcanization of EPDM elastomers
    Patent number: 4099003
    Abstract: Thiuram sulfides of oxazolidines and thiazolidines are disclosed herein and shown to be useful as non-blooming accelerators in the vulcanization of ethylene-propylene-diene-terpolymers.
    Type: Grant
    Filed: June 11, 1976
    Date of Patent: July 4, 1978
    Assignee: Pennwalt Corporation
    Inventors: Ivan Christoff Popoff, Everett A. Mailey, Paul Gordon Haines
  • Oxazolidine and thiazolidine carbodithioates
    Patent number: 4008244
    Abstract: Oxazolidine and thiazolidine carbodithioates of sodium, potassium and specified alkyl substituted ammonium which are useful as vulcanization accelerators for EPDM elastomers while demonstrating non-blooming characteristics.
    Type: Grant
    Filed: August 15, 1975
    Date of Patent: February 15, 1977
    Assignee: Pennwalt Corporation
    Inventors: Ivan Christoff Popoff, Paul Gordon Haines
  • Process for the vulcanization of EPDM elastomers
    Patent number: 3987017
    Abstract: Oxazolidine and thiazolidinecarbodithioates, and pyridine adducts thereof, are accelerators for the vulcanization of EPDM elastomers, wherein they exhibit non-blooming characteristics.
    Type: Grant
    Filed: January 24, 1975
    Date of Patent: October 19, 1976
    Assignee: Pennwalt Corporation
    Inventors: Ivan Christoff Popoff, Paul Gordon Haines
  • Pyridine adducts of oxazolidine and thiazolidine-derived carbodithioates
    Patent number: 3976648
    Abstract: Oxazolidine and thiazolidinecarbodithioates, and pyridine adducts thereof, are accelerators for the vulcanization of EPDM elastomers, wherein they exhibit non-blooming characteristics.
    Type: Grant
    Filed: January 24, 1975
    Date of Patent: August 24, 1976
    Assignee: Pennwalt Corporation
    Inventors: Ivan Christoff Popoff, Paul Gordon Haines
  • Oxazolidine and thiazolidine derived carbodithioate compositions useful as vulcanization accelerators
    Patent number: 3943143
    Abstract: Oxazolidine and thiazolidinecarbodithioates, and pyridine adducts thereof, are accelerators for the vulcanization of EPDM elastomers, wherein they exhibit non-blooming characteristics.
    Type: Grant
    Filed: February 1, 1974
    Date of Patent: March 9, 1976
    Assignee: Pennwalt Corporation
    Inventors: Ivan Christoff Popoff, Paul Gordon Haines