Patents by Inventor Claudette Brown

Claudette Brown 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).

  • Method of producing calcium sulfate alpha-hemihydrate
    Patent number: 6652825
    Abstract: A method of producing calcium sulfate &agr;-hemihydrate is disclosed, including the steps of exposing a mixture including a calcium sulfate form selected from the group consisting of calcium sulfate dihydrate, calcium sulfate &bgr;-hemihydrate, water-soluble calcium sulfate anhydrite, and mixtures thereof, water, and a crystallization catalyst, to microwave radiation to produce calcium sulfate &agr;-hemihydrate; and separating at least a portion of the calcium sulfate &agr;-hemihydrate to provide a solid comprising calcium sulfate &agr;-hemihydrate and a filtrate and/or remainder that can be recycled to provide at least one of a calcium sulfate form, water, a crystallization catalyst, a crystal habit modifier, and a surfactant for use in production of additional &agr;-hemihydrate.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: November 25, 2003
    Assignee: National Gypsum Properties LLC
    Inventors: Gopalakrishnan Sethuraman, Claudette Brown, Ronald S. Finkelstein
  • Method of producing calcium sulfate alpha-hemihydrate
    Publication number: 20020164281
    Abstract: A method of producing calcium sulfate &agr;-hemihydrate, including the steps of exposing a mixture including a calcium sulfate form selected from the group consisting of calcium sulfate dihydrate, calcium sulfate &bgr;-hemihydrate, water-soluble calcium sulfate anhydrite, and mixtures thereof, water, and a crystallization catalyst, to microwave radiation to produce calcium sulfate &agr;-hemihydrate; and separating at least a portion of the calcium sulfate &agr;-hemihydrate to provide a solid comprising calcium sulfate &agr;-hemihydrate and a remainder, is disclosed.
    Type: Application
    Filed: May 1, 2001
    Publication date: November 7, 2002
    Inventors: Gopalakrishnan Sethuraman, Claudette Brown, Ronald S. Finkelstein