Patents by Inventor Amy M. DeVries

Amy M. DeVries 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).

  • Polymerizable acidic compounds and methods of preparation
    Patent number: 6143919
    Abstract: Polymerizable urethane acid compounds are provided. Preferred compounds additionally comprise a hydroxy functionality. These compounds are made by reaction of hydroxy functional acid compounds with isocyanates.
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: November 7, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Byron Ciping Shen, Charles M. Leir, Amy M. DeVries