Patents by Inventor Henry C. Fisher

Henry C. Fisher 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 of environmentally acceptable scale inhibitors
    Patent number: 9296631
    Abstract: Alkyl phosphonates prepared from amino acids suitable for use in inhibiting scale. The phosphonates are obtained as reaction mixtures where the level of alkyl phosphonation is deliberately controlled to provide only partial alkyl phosphonation of the amino acid. The resulting alkyl phosphonates exhibit improved environmental properties compared to the fully substituted species, while still exhibiting acceptable efficacy in the control of scale. The compositions possess advantages over existing phosphonates in that they exhibit higher biodegradation by method OECD 306. They also offer lower toxicity to marine life compared to the fully substituted species and are not expected to bioaccumulate.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: March 29, 2016
    Assignee: Ecolab USA Inc.
    Inventors: Scot H. Bodnar, Henry C. Fisher, Andrew Frederick Miles, Curtis D. Sitz
  • Synthesis of H-phosphonate intermediates and their use in preparing the herbicide glyphosate
    Patent number: 9035083
    Abstract: The esterfication of hypophosphorous acid is followed by reaction with another molecule of alcohol under the action of a nickel catalyst to provide a green method for the preparation of H-phosphonate diesters. This method avoids the need for any stoichiometric chlorine unlike those based on phosphorous trichloride.
    Type: Grant
    Filed: March 21, 2014
    Date of Patent: May 19, 2015
    Assignee: Texas Christian University
    Inventors: Jean-Luc Montchamp, Henry C. Fisher
  • Synthesis of H-Phosphonate Intermediates and Their Use in Preparing the Herbicide Glyphosate
    Publication number: 20140303394
    Abstract: The esterfication of hypophosphorous acid is followed by reaction with another molecule of alcohol under the action of a nickel catalyst to provide a green method for the preparation of H-phosphonate diesters. This method avoids the need for any stoichiometric chlorine unlike those based on phosphorous trichloride.
    Type: Application
    Filed: March 21, 2014
    Publication date: October 9, 2014
    Applicant: Texas Christian University
    Inventors: Jean-Luc Montchamp, Henry C. Fisher
  • PREPARATION OF ENVIRONMENTALLY ACCEPTABLE SCALE INHIBITORS
    Publication number: 20100163494
    Abstract: Alkyl phosphonates prepared from amino acids suitable for use in inhibiting scale. The phosphonates are obtained as reaction mixtures where the level of alkyl phosphonation is deliberately controlled to provide only partial alkyl phosphonation of the amino acid. The resulting alkyl phosphonates exhibit improved environmental properties compared to the fully substituted species, while still exhibiting acceptable efficacy in the control of scale. The compositions possess advantages over existing phosphonates in that they exhibit higher biodegradation by method OECD 306. They also offer lower toxicity to marine life compared to the fully substituted species and are not expected to bioaccumulate.
    Type: Application
    Filed: June 26, 2009
    Publication date: July 1, 2010
    Applicant: CHAMPION TECHNOLOGIES, INC.
    Inventors: Scot H. Bodnar, Henry C. Fisher, Andrew Frederick Miles, Curtis D. Sitz