Patents by Inventor Donat L. Godbout

Donat L. Godbout 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).

  • Solidified liquid crystals of cellulose with optically variable properties
    Patent number: 5629055
    Abstract: Solid films with novel optical properties are produced from colloidal suspensions of cellulose crystallites; the colloidal suspensions are prepared by acid hydrolysis of crystalline cellulose under carefully controlled conditions; the solid materials possess a helicoidal arrangement of the constituent crystallites; by appropriate selection of conditions for preparation and treatment of the colloidal suspensions, solid films are produced that reflect circularly polarized visible light; the wavelength of the reflected light can be controlled to give colours across the visible spectrum from red to violet, and if necessary to infrared and ultraviolet wavelengths.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: May 13, 1997
    Assignee: Pulp and Paper Research Institute of Canada
    Inventors: Jean-Fran.cedilla.ois Revol, Donat L. Godbout, Derek G. Gray