Patents Examined by Christine Maapin
  • Method for production of cellulose derivatives and the resulting products
    Patent number: 6531593
    Abstract: Cellulose derivatives are formed by first crosslinking cellulose and subsequently reacting the crosslinked cellulose with a reagent capable of forming a cellulose ether or ester. Many crosslinking agents are suitable but those forming ether linkages between cellulose chains are preferred. The crosslinking, in effect, increases the D.P of the cellulose so that wood celluloses are then suitable for forming compositions that previously could only be formed very high D.P celluloses; e.g., those derived from cotton linters.
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: March 11, 2003
    Assignee: Weyerhaeuser Company
    Inventors: Mengkui Luo, Richard A. Jewell, Amar N. Neogi