Patents by Inventor Cheryl Ann Littau

Cheryl Ann Littau 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).

  • Detergents and cleaners comprising narrow homolog distribution of alkoxylated fatty acid alkyl esters
    Patent number: 6395694
    Abstract: Detergents and cleaners which comprise fatty acid alkyl ester alkoxylates of the formula R1—COO(AO)n—R2 with narrow homolog distribution, where R1 is a straight-chain or branched alkyl or alkenyl group having from 5 to 22, preferably from 8 to 18, carbon atoms, R2 is C1-C6-alkyl or C2-C6-alkenyl, preferably methyl, AO is a C2-C4-alkylene oxide unit, and n is a number from 1 to 20, preferably from 3 to 12, in particular from 4 to 10, and these fatty acid alkyl ester alkoxylates contain less than 14% by weight of compounds with a content of no more than (a−3) —AO groups and less than 16% by weight of compounds with a content of not below (a+3) —AO groups, where A is the number of —AO groups with the maximum frequency.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: May 28, 2002
    Assignee: Clariant GmbH
    Inventor: Cheryl Ann Littau
  • Detergents, cleaning compositions and disinfectants comprising chlorine-active substances and fatty acid alkyl ester ethoxylates
    Patent number: 6303564
    Abstract: Detergents, cleaning compositions and disinfectants comprising a chlorine-active substances and fatty acid alkyl ester ethoxylates Detergents, cleaning compositions and disinfectants comprising a chlorine-active substance and a fatty acid alkyl ester ethoxylate of the formula RO(CH2CH2O)nCOR1 in which R is C1-C4-alkyl, R1 is C5-C22-alkyl or C5-C22-alkenyl, and n is a number from 1 to 30.
    Type: Grant
    Filed: December 1, 1998
    Date of Patent: October 16, 2001
    Assignee: Clariant GmbH
    Inventors: Cheryl Ann Littau, Ignaz Wimmer
  • Process for reducing residual raw material impurities in tertiary amine oxides
    Patent number: 6054616
    Abstract: The claimed process consists in treating the tertiary amine oxide with a sulphite or a bleach activator.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: April 25, 2000
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Cheryl Ann Littau, Graham Cox, Michael Neil Holland