Patents by Inventor Stephen R. Kurowsky

Stephen R. Kurowsky 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).

  • Use of acrylamide copolymer to reduce stickies deposits
    Patent number: 6387215
    Abstract: A process for controlling/reducing the deposition of stickies from paper stock suspensions in papermaking involving the steps of: (a) providing a paper stock suspension containing stickies; and (b) contacting the stickies in the paper stock suspension with a copolymer of about 75-95 wt % acrylamide and about 5-25 wt % vinyl acetate.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: May 14, 2002
    Assignee: Callaway Chemical Corporation
    Inventors: Gavin G. Spence, Alan J. Schellhamer, Stephen R. Kurowsky
  • Terpolymers of maleic anhydride and their use as scale control agents
    Patent number: 4223120
    Abstract: Terpolymers of maleic anhydride, acrylamide or methacrylamide and a third monomer consisting of octene, styrene and the like.Copolymers of maleic anhydride and acrylamide or methacrylamide.Use of the hydrolyzed form of the terpolymer as a scale control agent.Novel process employing a mixture of aromatic and ketonic solvent and a temperature of at least 120.degree. C. which renders the polymers of the invention insoluble in water at ambient temperature.
    Type: Grant
    Filed: December 8, 1978
    Date of Patent: September 16, 1980
    Assignee: Pfizer Inc.
    Inventor: Stephen R. Kurowsky
  • Terpolymers of maleic anhydride and their use as scale control agents
    Patent number: 4065607
    Abstract: Terpolymers of maleic anhydride, acrylamide or methacrylamide and a third monomer consisting of octene, styrene and the like.Copolymers of maleic anhydride and acrylamide or methacrylamide.Use of the hydrolyzed form of the terpolymer as a scale control agent.Novel process employing a mixture of aromatic and ketonic solvent and a temperature of at least 120.degree. C. which renders the polymers of the invention insoluble in water at ambient temperature.
    Type: Grant
    Filed: March 23, 1977
    Date of Patent: December 27, 1977
    Assignee: Pfizer Inc.
    Inventor: Stephen R. Kurowsky