Patents by Inventor Gary S. Sayers

Gary S. Sayers 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-forming compositions
    Patent number: 4758612
    Abstract: A hardenable composition which comprises (i) a poly(carboxylic acid) or precursor thereof (as herein defined); (ii) a particulate ion-leachable silicate, aluminosilicate or metal oxide reactable with (i) in the presence of water to set to a hardened composition; and (iii) a compound comprising at least one phosphorus-carbon or phosphorus-boron covalent bond, in an amount effective in service to extend the working time of the composition.
    Type: Grant
    Filed: October 21, 1986
    Date of Patent: July 19, 1988
    Assignee: National Research Development Corporation
    Inventors: Alan D. Wilson, Havard J. Prosser, David M. Groffman, Gary S. Sayers