Patents by Inventor John J. Ryan, deceased

John J. Ryan, deceased 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 treating pulp to reduce disintegration energy
    Patent number: 6159335
    Abstract: A method of reducing the amount of energy required to disintegrate comminution sheets formed from cellulose fibers without adversely affecting the absorbency, strength, or fluid transport properties of airfelts formed from the comminuted treated fibers. The method of the present invention includes the steps of preparing an aqueous slurry of cellulose fibers, adding an effective amount of a debonding agent such as aluminum or Kaolin clay to the cellulose slurry, and forming a comminution sheet from the fibers treated with the debonding agent. The debonding agent is added to the cellulose slurry in an amount effective to reduce the energy required to disintegrate comminution sheets formed from the fibers in the slurry by up to 50% of the amount of energy required to disintegrate comminution sheets formed from untreated pulp.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: December 12, 2000
    Assignee: Buckeye Technologies Inc.
    Inventors: James William Owens, John P. Erspamer, Charles Edward Bost, John J. Ryan, deceased