Patents by Inventor Curtis D. Sitz

Curtis D. Sitz 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
  • 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
  • Oil-soluble scale inhibitors with formulation for improved environmental classification
    Publication number: 20020150499
    Abstract: The present invention provides compositions of oil-soluble inhibitors suitable for use in inhibiting scale formation in a hydrocarbon production system, such as in an oil field. The compositions comprise an acid form of a known scale inhibitor and 2-ethylhexylamine and similar amines. These compositions possess advantages over conventional compositions used for inhibiting scale formation in that they are less toxic, more biodegradable, and less likely to invade the fatty tissues of marine life.
    Type: Application
    Filed: January 23, 2002
    Publication date: October 17, 2002
    Inventors: James M. Reizer, Michael G. Rudel, Curtis D. Sitz, Rex M. S. Wat, Harry Montgomerie, Andrew Frederick Miles
  • Scale inhibitors
    Patent number: 6379612
    Abstract: The present invention provides compositions of oil-soluble inhibitors suitable for use in inhibiting oil field scale formation. The compositions comprise an acid form of a known scale inhibitor and a tertiary alkyl primary amine. These compositions possess advantages over conventional compositions used for inhibiting oil field scale.
    Type: Grant
    Filed: July 27, 1999
    Date of Patent: April 30, 2002
    Assignee: Champion Technologies, Inc.
    Inventors: James M. Reizer, Michael G. Rudel, Curtis D. Sitz, Rex M. S. Wat, Harry Montgomerie