Patents by Inventor Fred A. Heitfeld

Fred A. Heitfeld 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 for quantitating organic peracid using catalase
    Patent number: 6432661
    Abstract: The invention provides an improved procedure for the precise quantitation of organic oxidants in a solution with hydrogen peroxide in which the peroxide is removed by the addition of catalase to scavenge the same. Surprisingly, the catalase does not affect the organic oxidant, and the procedure can accurately quantitate even minute amounts of the organic oxidant. The inventive method is especially effective in quantitating peracid generated enzymatically, although it can be used for chemically generated organic oxidants.
    Type: Grant
    Filed: October 5, 1994
    Date of Patent: August 13, 2002
    Assignee: The Clorox Company
    Inventors: Fred A. Heitfeld, Susan A. Anderson
  • Proteolytic perhydrolysis system and method of use for bleaching
    Patent number: 5364554
    Abstract: A perhydrolysis system or activated oxidant system for in situ generation of peracid in aqueous solutions is disclosed including a protease enzyme, a source of hydrogen peroxide and an ester substrate having the general structure ##STR1## where R and R' are alkyl groups unsubstituted or substituted with at least one functional group. Preferred substrates are defined which are preferably chemically non-perhydrolyzable. Processes for bleaching and peracid production are also disclosed.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: November 15, 1994
    Assignee: The Clorox Company
    Inventors: Anna G. Stanislowski, Fred A. Heitfeld, Richard J. Wiersema, Ayyookaran J. Poulose
  • Odor control animal litter containing sodium fluoride
    Patent number: 5097799
    Abstract: This invention relates to an animal litter to which has been applied an odor-inhibiting amount of an alkali metal fluoride.
    Type: Grant
    Filed: August 30, 1990
    Date of Patent: March 24, 1992
    Assignee: The Clorox Company
    Inventors: Fred A. Heitfeld, Randy L. Wood
  • Odor control animal litter
    Patent number: 4957063
    Abstract: This invention relates to an animal litter to which has been applied on odor-inhibiting amount of a guanidine salt.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: September 18, 1990
    Assignee: The Clorox Company
    Inventors: Fred A. Heitfeld, Randy L. Wood