Patents by Inventor Charles M. Anderegg

Charles M. Anderegg 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).

  • Cement grinding aid and set retarder
    Patent number: 4204877
    Abstract: Additives for use as grinding aids and set retarders in the manufacture of hydraulic cement composed of polyglycerol, preferably a polyglycerol selected from the group of di-, tri-, and tetraglycerol and mixtures thereof, the additive being used either alone or in combination with at least one of a water-soluble glycol, a water-soluble hydroxy-alkyl amine, a water-soluble salt of a sulfonated lignin and a water-soluble salt of an aliphatic acid having no more than three carbon atoms, the hydraulic cement product of this addition and the method for making the cement product.
    Type: Grant
    Filed: January 15, 1979
    Date of Patent: May 27, 1980
    Assignee: Westvaco Corporation
    Inventors: Howard H. Moorer, Charles M. Anderegg