Patents by Inventor Raymond L. Maffei

Raymond L. Maffei 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).

  • Extraction and cleaning processes
    Patent number: 4012194
    Abstract: Extraction and cleaning processes characterized by the use of liquid carbon dioxide as the extraction and cleaning solvent. This solvent is disclosed as being applied to plant material for the extraction of essential oils and as being used in place of the conventional solvents in the dry cleaning of garments.
    Type: Grant
    Filed: August 2, 1973
    Date of Patent: March 15, 1977
    Inventor: Raymond L. Maffei