Patents by Inventor Theodore V. Kowalchyn

Theodore V. Kowalchyn 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).

  • Patent number: 5030362
    Abstract: Undesirable materials, such as unreacted raw materials and by-products, are stripped from liquid systems by delivering a compressed, inert gas through the pores of a sintered porous sparger element and into the liquid system in the form of very small gas micro bubbles.
    Type: Grant
    Filed: August 21, 1989
    Date of Patent: July 9, 1991
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Pauliran Da Silva, Silvio Balestieri, Francesco Cerbino, Augusto P. Queiroz, Theodore V. Kowalchyn
  • Patent number: 5006608
    Abstract: The molecular weight and the thickening efficiency of primarily oil soluble hydrocarbon polymers, such as hydrogenated random copolymers and block copolymers of styrene-isoprene or styrene-butadiene, polyisobutylene, poly-n-butene, low unsaturation butyl rubbers, low unsaturation EPDM rubbers, preferably ethylene-propylene copolymers, of the type which are to be used as viscosity index improver additives or as precursors for dispersants and multi-functional viscosity improver additives for lubricating oils, are reduced by heating and masticating the polymers in the presence of oxygen or air and in the presence of a transition metal catalyst, preferably in the further presence of a peroxide accelerator.
    Type: Grant
    Filed: September 8, 1988
    Date of Patent: April 9, 1991
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: John B. Gardiner, Anthony A. Loffredo, ricardo Bloch, Nicholas C. Nahas, Keith U. Ingold, Theodore V. Kowalchyn