Patents by Inventor Lawrence B. Heit

Lawrence B. Heit 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).

  • Supercritical fluid and near critical gas extraction of organic solvents from formed articles
    Patent number: 5287632
    Abstract: Disclosed is a method of removing residual organic solvents from formed compressed articles such as tablets comprised of subjecting the organic solvent laden compressed article to a supercritical fluid or near critical gas whereby residual solvent is transferred from the solvent laden solid article to the supercritical fluid or near critical gas and separating the residual solvent depleted compressed article from the solvent enriched supercritical fluid or near critical gas.
    Type: Grant
    Filed: July 24, 1990
    Date of Patent: February 22, 1994
    Assignee: Ciba-Geigy Corporation
    Inventors: Lawrence B. Heit, James M. Clevenger