Patents by Inventor Christopher P. Howland

Christopher P. Howland 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).

  • Preparation and utility of water-soluble polymers having pendant derivatized amide, ester or ether functionalities as ceramics dispersants and binders
    Patent number: 6005040
    Abstract: Methods for dispersing and binding ceramic materials in aqueous media are disclosed. The methods utilize water-soluble polymers having pendant derivatized amide, ester or ether functionalities for dispersing and binding various classes of ceramic materials.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: December 21, 1999
    Assignee: Nalco Chemical Company
    Inventors: Christopher P. Howland, Kevin J. Moeggenborg, John D. Morris, Peter E. Reed, Jiansheng Tang, Jin-Shan Wang
  • Polyamide binders for ceramics manufacture
    Patent number: 5922801
    Abstract: A method for binding ceramic materials in aqueous media is disclosed. The method utilizes water-soluble polyamides prepared by condensation polymerization for binding various classes of ceramic materials.
    Type: Grant
    Filed: December 3, 1997
    Date of Patent: July 13, 1999
    Assignee: Nalco Chemical Company
    Inventors: Kristy M. Bailey, Christopher P. Howland, Kevin J. Moeggenborg
  • Preparation and utility of water-soluble polymers having pendant derivatized amide, ester or ether functionalities as ceramics dispersants and binders
    Patent number: 5880237
    Abstract: Methods for dispersing and binding ceramic materials in aqueous media are disclosed. The methods utilize water-soluble polymers having pendant derivatized amide, ester or ether functionalities for dispersing and binding various classes of ceramic materials.
    Type: Grant
    Filed: December 4, 1997
    Date of Patent: March 9, 1999
    Assignee: Nalco Chemical Company
    Inventors: Christopher P. Howland, Kevin J. Moeggenborg, John D. Morris, Peter E. Reed, Jiansheng Tang, Jin-Shan Wang
  • Preparation and utility of water-soluble polymers having pendant derivatized amide, ester or ether functionalities as ceramics dispersants and binders
    Patent number: 5726267
    Abstract: Methods for dispersing and binding ceramic materials in aqueous media are disclosed. The methods utilize water-soluble polymers having pendant derivatized amide, ester or ether functionalities for dispersing and binding various classes of ceramic materials.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: March 10, 1998
    Assignee: Nalco Chemical Company
    Inventors: Christopher P. Howland, Kevin J. Moeggenborg, John D. Morris, Peter E. Reed, Jiansheng Tang, Jin-shan Wang
  • Hydrophobically associating dispersants used in forming polymer dispersions
    Patent number: 5597858
    Abstract: An improved process for the preparing a dispersions of water soluble cationic polymers in an aqueous salt solution is disclosed. The improvement comprises using as a polymeric dispersion stabilizer a water soluble hydrophobically associating copolymer of diallyldimethylammonium chloride and a monomer selected from the group consisting of: ##STR1## and alkyl esters of acrylic acid, where R.sub.1 is either hydrogen or CH.sub.3 ; R.sub.2 and R.sub.3 are each an alkyl group having 1 to 3 carbon atoms; A.sub.1 is either an oxygen atom or NH; B.sub.1 is either an alkylene group having 2 to 4 carbon atoms or a hydroxypropylene group, Q is benzyl, or C.sub.6 -C.sub.20 alkyl, and X.sub.1.sup.- is an anionic counterion.
    Type: Grant
    Filed: March 22, 1995
    Date of Patent: January 28, 1997
    Assignee: Nalco Chemical Company
    Inventors: Manian Ramesh, Jeffrey R. Cramm, Darrell L. Werges, Christopher P. Howland