Patents by Inventor E. D. Hildreth

E. D. Hildreth 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).

  • Non-ionic surfactant based detergent formulations with short chain amphoteric additives
    Patent number: 4824605
    Abstract: A non-ionic surfactant detergent formulation comprising a detergent and additives to improve the properties of the detergent and wherein the detergent comprises a non-ionic surfactant, and the additive comprises a zwitterionic surfactant carrying at least one hydrophobic group having a straight or branched aliphatic chain of 5 to 9 carbon atoms and at least one aliphatic substituent carrying an anionic water-solubilizing group.
    Type: Grant
    Filed: June 16, 1988
    Date of Patent: April 25, 1989
    Inventor: E. D. Hildreth
  • Non-ionic surfactant based detergent formulations with short chain amphoteric additives
    Patent number: 4759877
    Abstract: A non-ionic surfactant detergent formulation comprising a detergent and additives to improve the properties of the detergent and wherein the detergent comprises a non-ionic surfactant, and the additive comprises a zwitterionic surfactant carrying at least one hydrophobic group having a straight or branched aliphatic chain of 5 to 9 carbon atoms and at least one aliphatic substituent carrying an anionic water-solubilizing group.
    Type: Grant
    Filed: July 31, 1986
    Date of Patent: July 26, 1988
    Inventors: E. D. Hildreth, Karl Heyman