Patents by Inventor Bruce T. Maeda

Bruce T. Maeda 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).

  • Halohydrocarbon recovery process
    Patent number: 5837106
    Abstract: A halohydrocarbon solvent recovery process. The process in one embodiment included heating a gross mixture including solvent, fatty-acid impurities and water in a bath to vaporize at least a portion of the solvent and the impurities. A portion of the vapor is then condensed in a reflux condenser to form a condensate mixture. After drying and impurity adsorption, a solvent product of at least 99% purity may be recovered. In one embodiment, the gross mixture is obtained from steam stripping dry-cleaner filter cartridges.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: November 17, 1998
    Assignee: Technichem Engineering, Ltd.
    Inventors: Mark J. Ng, Bruce T. Maeda
  • Halohydrocarbon recovery process
    Patent number: 5374337
    Abstract: A halohydrocarbon solvent recovery process. The process in one embodiment includes heating a gross mixture including solvent, fatty-acid impurities and water in a bath to vaporize at least a portion of the solvent and the impurities. A portion of the vapor is then condensed in a reflux condenser to form a condensate mixture. After drying and impurity absorption, a solvent product of at least 99% purity may be recovered. In one embodiment, the gross mixture is obtained from steam stripping dry-cleaner filter cartridges.
    Type: Grant
    Filed: August 20, 1993
    Date of Patent: December 20, 1994
    Assignee: Technichem Engineering, Ltd.
    Inventors: Mark J. Ng, Bruce T. Maeda