Patents by Inventor Brian S. Gilbert

Brian S. Gilbert 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).

  • Drying shrinkage cement admixture
    Patent number: 5604273
    Abstract: The subject invention is directed to a cement admixture composition composed of certain alkylene glycols and copolymers of alkenyl ether and maleic anhydride. The present admixture provides a means to inhibit drying shrinkage of cement compositions while enhancing the compressive strength of the set composition.
    Type: Grant
    Filed: September 18, 1995
    Date of Patent: February 18, 1997
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Awdhoot V. Kerkar, Brian S. Gilbert
  • Method and apparatus for spray applying fireproofing compositions
    Patent number: 5520332
    Abstract: A method and apparatus for controlling the flow rate of relatively low viscosity fluids, such as accelerators, in viscous, hydraulic slurry spray application systems. An adjustable accelerator flow control system which regulates excess air pressure supplied to the accelerator pump in response to height variations of the spray nozzle is provided. The system is especially useful with fireproofing compositions since it provides effective distribution and constant flow of a viscous, hydraulic cementitious slurry with an acidic accelerator.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: May 28, 1996
    Assignee: W. R. Grace & Co. - Conn.
    Inventors: James M. Gaidis, Brian S. Gilbert, Arnold M. Rosenberg