Patents by Inventor Angela Zagala

Angela Zagala 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).

  • Method of preparing modified diallyl-N,N-disubstituted ammonium halide polymers
    Publication number: 20060084772
    Abstract: A method of preparing a modified diallyl-N,N-disubstituted ammonium halide polymer and use of the polymer in combination with one or more high molecular weight, water soluble cationic, anionic, nonionic, zwitterionic or amphoteric polymers for increasing retention and drainage in a papermaking furnish.
    Type: Application
    Filed: October 15, 2004
    Publication date: April 20, 2006
    Inventors: Jane Wong Shing, Alessandra Gerli, Xavier Cardoso, Angela Zagala, Przem Pruszynski, Cathy Doucette
  • Method of preparing modified diallyl-N,N-disubstituted ammonium halide polymers
    Publication number: 20060084771
    Abstract: A method of preparing a modified diallyl-N,N-disubstituted ammonium halide polymer and use of the polymer in combination with one or more high molecular weight, water soluble cationic, anionic, nonionic, zwitterionic or amphoteric polymers for increasing retention and drainage in a papermaking furnish.
    Type: Application
    Filed: October 15, 2004
    Publication date: April 20, 2006
    Inventors: Jane Wong Shing, Alessandra Gerli, Xavier Cardoso, Angela Zagala, Przem Pruszynski, Cathy Doucette
  • Method of using aldehyde-functionalized polymers to enhance paper machine dewatering
    Publication number: 20050161181
    Abstract: A method of enhancing the dewatering of a paper sheet on a paper machine comprising adding to the paper sheet about 0.05 lb/ton to about 15 lb/ton, based on dry fiber, of one or more aldehyde functionalized polymers comprising amino or amido groups wherein at least about 15 mole percent of the amino or amido groups are functionalized by reacting with one or more aldehydes and wherein the aldehyde functionalized polymers have a molecular weight of at least about 100,000.
    Type: Application
    Filed: January 26, 2004
    Publication date: July 28, 2005
    Inventors: Michael St. John, Angela Zagala
  • Method for preparing (co)polymers having a narrow molecular weight distribution
    Patent number: 6303722
    Abstract: The present invention concerns a novel method for preparing polymers (preferably (meth)acrylate polymers and copolymers) having a narrow molecular weight distribution by metal-free anionic polymerization in the presence of a phosphonium salt of a nitrogen, oxygen and/or sulfur anion. The present invention also concerns block copolymer and methods of making the same using anionic polymerization in the presence of the phosphonium salt to prepare at least one block of the copolymer.
    Type: Grant
    Filed: December 10, 1998
    Date of Patent: October 16, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Christof Mehler, Thieo E. Hogen-Esch, Axel Müller, Angela Zagala
  • Block copolymers and a novel method for preparing (co)polymers having a narrow molecular weight distribution by metal-free anionic polymerization in the presence of a phosphonium cation
    Patent number: 5610248
    Abstract: The present invention concerns a novel method for preparing polymers (preferably (meth)acrylate polymers and copolymers) having a narrow molecular weight distribution by metal-free anionic polymerization in the presence of a phosphonium cation. The present invention also concerns block copolymers and methods of making the same using anionic polymerization in the presence of a phosphonium cation to prepare at least one block of the copolymer.
    Type: Grant
    Filed: March 6, 1995
    Date of Patent: March 11, 1997
    Assignee: The University of Southern California
    Inventors: Thieo Hogen-Esch, Angela Zagala