Patents by Inventor Wellington L. Repette

Wellington L. Repette 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).

  • Hydrated calcium aluminate based expansive admixture
    Patent number: 6447597
    Abstract: An additive, a mixture incorporating the additive and a method of formulating a mortar incorporating the additive. The additive is based on calcium sulfoaluminate composed of C3AH6 and CAH10 where C=calcium oxide, A=aluminum oxide and H=water. The admixture includes gypsum and calcium hydroxide. The calcium aluminum hydrates are obtained by hydration of high alumina cement particles to eliminate any lack of hydration in the core of the particle. The method involves the preparation of such particles and the mix incorporates the particles to produce a homogeneously hydrated cement additive.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: September 10, 2002
    Assignee: National Research Council
    Inventors: Wellington L. Repette, Noel P. Mailvaganam