Patents by Inventor Fred Kurt Rubin

Fred Kurt Rubin 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 and compositions for removal of hard surface manganese ion-derived discolorations
    Patent number: 4049467
    Abstract: Manganese ion-derived discolorations are removed from hard surfaces by the use of either dihydroxy maleic acid, dihydroxy tartaric acid, their alkali metal salts, or mixtures thereof.The non-toxicity and non-corrosivity of the disclosed compounds make them particularly suitable for household applications.
    Type: Grant
    Filed: April 23, 1976
    Date of Patent: September 20, 1977
    Assignee: Lever Brothers Company
    Inventor: Fred Kurt Rubin