Patents by Inventor Fred Dewey

Fred Dewey 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).

  • Method for making cellulose esters incorporating near-infrared fluorophores
    Patent number: 6036885
    Abstract: A cellulosic ester has associated with the ester at least one near infrared fluorophore. A method for incorporating the near infred fluorophore into the cellulosic ester is also provided. In the method, the near infrared fluorophore is dissolved in a strong acid and precipitated to form an acid paste. The paste is then added to an activated cellulose, such as a hydrolyzed cellulose acetate, in the presence of at least one acid and acid anhydride. Advantageously, such marked cellulosic materials can be solvent spun into staple fibers which may be further utilized in known materials, webs and articles.
    Type: Grant
    Filed: September 15, 1998
    Date of Patent: March 14, 2000
    Assignee: Eastman Chemical Company
    Inventors: James John Krutak, Sr., Thomas Vernon McCray, Edwin Taylor Boyd, Fred Dewey Barlow, Jr., Melvin Glenn Mitchell, Lee Reynolds Partin
  • Log lifting beam assembly
    Patent number: 5297832
    Abstract: A crane operated log lifting beam assembly for unloading a tier of logs from a truck. The beam assembly includes two cable operated longitudinally displaceable trolley systems for securing an attached pulp sling against the tier of logs and a displacement equalizing system for interconnecting the trolley systems and for controlling the relative displacement thereof.
    Type: Grant
    Filed: January 7, 1993
    Date of Patent: March 29, 1994
    Inventors: Fred Dewey, Patrick Dewey