Patents by Inventor Anne-Marie Tillman

Anne-Marie Tillman 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).

  • Acetylation of lignocellulosic materials
    Patent number: 4804384
    Abstract: Reaction of lignocellulosic material with uncatalyzed acetic anhydride in the absence of any cosolvent is disclosed. The process improves dimensional stability and resistance to biological attack of the lignocellulosic material. Lignocellulosic material is treated by exposure to liquid acetic anhydride for at least a short period of time, after which it is then heated to acetylate the material. The excess anhydride and byproduct acetic acid can be removed by vacuum.
    Type: Grant
    Filed: April 8, 1987
    Date of Patent: February 14, 1989
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Roger M. Rowell, Rune Simonson, Anne-Marie Tillman