Patents by Inventor Franklin W. Herrick

Franklin W. Herrick 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).

  • Process for preparing microfibrillated cellulose
    Patent number: 4481077
    Abstract: A process of preparing microfibrillated cellulose comprising adding to never-dried cellulosic pulp an additive compound capable of substantially inhibiting hydrogen bonding of the fibrils in the cellulose and then drying the pulp and additive. Microfibrillation of a suspension of the cellulosic pulp is carried out at considerably increased efficiency if the additive compound is present prior to drying the pulp. The resulting MFC product can be dried and redispersed without substantial loss of viscosity.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: November 6, 1984
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Franklin W. Herrick
  • Redispersible microfibrillated cellulose
    Patent number: 4481076
    Abstract: Redispersible microfibrillated cellulose is prepared by the addition to a liquid dispersion of the microfibrillated cellulose, an additive compound capable of substantially inhibiting hydrogen bonding between the cellulose fibrils. The microfibrillated cellulose, upon drying, is characterized by having a viscosity when redispersed in water of at least 50% of the viscosity of an equivalent concentration of the original dispersion.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: November 6, 1984
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Franklin W. Herrick