Patents by Inventor David B. Harper

David B. Harper 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).

  • Methylation of organic compounds
    Patent number: 5240836
    Abstract: A method of O-methylation of a phenol, S-methylation of a thiophenal, or methylesterification of a carboxylic acid is disclosed, which involves contacting the phenol, thiophenol, or carboxylic acid with a halomethane in the presence of a fungus selected from the group consisting of Hymenochaetaceae, Polyporaceae, and Corticiaceae.
    Type: Grant
    Filed: November 23, 1990
    Date of Patent: August 31, 1993
    Assignee: The Queens University of Belfast
    Inventor: David B. Harper