Patents by Inventor John T. Pacanovsky

John T. Pacanovsky 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).

  • Hydration control of cementitious systems
    Patent number: 5634972
    Abstract: A method of controlling the hydration of a cementitious composition comprising the steps of:i) providing a cementitious composition containing an amount of a neutralized salt of an alpha-monohydroxy carboxylic acid effective to retard the cementitious composition, said carboxylic acid containing two or more carboxylic acid groups, and subsequently,ii) adding an additional amount of said neutralized salt of an alpha monohydroxy carboxylic acid or a second neutralized salt of an alpha monohydroxy carboxylic acid in an amount sufficient to activate hydration of the retarded cementitious composition, said cementitious composition comprising hydraulic binder and water.
    Type: Grant
    Filed: March 13, 1996
    Date of Patent: June 3, 1997
    Assignee: Sandoz Ltd.
    Inventors: John T. Pacanovsky, Lan Huang, Frank T. Gay, Samy M. Shendy