Patents by Inventor Martin A. Kreczmer

Martin A. Kreczmer 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).

  • Process for preparing peroxyacid precursors having amide moieties in the fatty chain
    Patent number: 5281746
    Abstract: A process for preparing precursors for amide containing organic peracids is disclosed wherein a polycarboxylic acid is esterified with a low molecular weight alkyl alcohol followed by formation of an amide by reacting the ester with an amine to provide a monoamido carboxylic acid ester. Unwanted diester is removed from the reaction mixture by precipitation at relatively low temperature. The ester is recovered from the reaction mixture by either precipitation or a distillation procedure under high temperature and reduced pressure. The esters are converted to acids highly desirable as precursors for peracids useful as bleaches in laundry detergents.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: January 25, 1994
    Assignee: Monsanto Company
    Inventors: Yueting Chou, Martin A. Kreczmer, David A. Martin
  • Process for preparing ether carboxylate builders
    Patent number: 5068420
    Abstract: There is disclosed a method for purifying the product of a calcium catalyzed reaction, in alkaline reaction medium of salts of maleic acid a hydroxy acid wherein impurities are removed by single stage solvent extraction and separation of the raffinate.
    Type: Grant
    Filed: November 9, 1990
    Date of Patent: November 26, 1991
    Assignee: Monsanto Company
    Inventor: Martin A. Kreczmer