Patents by Inventor Angel P. Zagala

Angel P. 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).

  • ALDEHYDE-FUNCTIONALIZED POLYMERS
    Publication number: 20100089542
    Abstract: A composition for enhancing the dewatering of a paper sheet on a paper machine and a method for using the composition is disclosed. The composition comprising 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. The method comprising adding the composition to the paper machine at a dosage of about 0.05 lb/ton to about 15 lb/ton, based on dry fiber.
    Type: Application
    Filed: December 14, 2009
    Publication date: April 15, 2010
    Inventors: Michael R. St. John, Angel P. Zagala
  • Method of using aldehyde-functionalized polymers to enhance paper machine dewatering
    Patent number: 7641766
    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: Grant
    Filed: January 26, 2004
    Date of Patent: January 5, 2010
    Assignee: Nalco Company
    Inventors: Michael R. St. John, Angel P. Zagala