Patents by Inventor Linda M. Hlivka

Linda M. Hlivka 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).

  • Liquid metal cleaner for aqueous system
    Patent number: 6156129
    Abstract: The invention relates to a composition useful for cleaning metal surfaces immersed in an aqueous system. The composition comprises as a mixture: an organic carboxylic acid; a non chelating amine; a chelating agent; and preferably a sulfur-containing polymer.
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: December 5, 2000
    Assignee: Ashland Inc.
    Inventors: Linda M. Hlivka, Joseph Mihelic, Bruce L. Libutti
  • Pitch control composition based on blend of derivatized cationic guar and styrene maleic anhydride copolymer
    Patent number: 6051160
    Abstract: This invention relates to a liquid composition for the control of pitch deposition in pulp and paper making comprising an aqueous solution of (1) a derivatized cationic guar, and (2) styrene maleic anhydride copolymer. The invention also relates to a process for inhibiting pitch deposition in pulp and papermaking systems and on papermaking equipment.
    Type: Grant
    Filed: April 15, 1998
    Date of Patent: April 18, 2000
    Assignee: Ashland Inc.
    Inventors: Linda M. Hlivka, George K. Wai
  • Process for controlling the deposition of pitch with a blend of derivatized cationic guar and styrene maleic anhydride copolymer
    Patent number: 5744003
    Abstract: This invention relates to a liquid composition for the control of pitch deposition in pulp and paper making comprising an aqueous solution of (1) a derivatized cationic guar, and (2) styrene maleic anhydride copolymer.
    Type: Grant
    Filed: July 30, 1996
    Date of Patent: April 28, 1998
    Assignee: Ashland Inc.
    Inventors: Linda M. Hlivka, George K. Wai
  • Pitch control composition
    Patent number: 5702644
    Abstract: This invention relates to a liquid composition for the control of pitch deposition in acid pulp and paper making operations comprising a derivatized cationic guar and an alkali metal polyacrylate dispersant. The invention also relates to a process for inhibiting pitch deposition on paper making equipment.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: December 30, 1997
    Assignee: Ashland Inc.
    Inventors: Linda M. Hlivka, George K. Wai
  • Pitch control composition and process for inhibiting pitch deposition
    Patent number: 5618861
    Abstract: This invention relates to a liquid composition for the control of pitch deposition in pulp and paper making comprising an aqueous solution of (1) a derivatized cationic guar, and (2) a nonionic polymer.
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: April 8, 1997
    Assignee: Ashland Inc.
    Inventors: Linda M. Hlivka, George K. Wai