Patents by Inventor Thomas R. Hanser

Thomas R. Hanser 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).

  • Esterified high lignin content cellulosic fibers
    Patent number: 5484896
    Abstract: Individualized, esterified high lignin content cellulosic fibers containing intrafiber C.sub.2 -C.sub.9 polycarboxylic acid ester perform unexpectedly better in absorbent applications than lower lignin content esterified fibers from the same furnish.
    Type: Grant
    Filed: March 24, 1994
    Date of Patent: January 16, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Shahrokh A. Naieni, Carlisle M. Herron, Thomas R. Hanser
  • Process for preparing individualized, polycarboxylic acid crosslinked fibers
    Patent number: 5190563
    Abstract: Disclosed is a process for making individualized, crosslinked fibers which includes the steps of providing cellulosic fibers, contacting the fibers with a solution containing a C.sub.2 -C.sub.9 polycarboxylic acid crosslinking agent, mechanically separating the fibers into substantially individual form, drying the fibers and reacting the crosslinking agent with the individualized fibers to form intrafiber crosslink bonds. Preferably, the crosslinking agent is citric acid, and preferably, between about 0.5 mole % and about 10.0 mole % of the crosslinking agent reacts to form the intrafiber crosslink bonds. The individualized, crosslinked fibers are useful in a variety of absorbent structure applications.
    Type: Grant
    Filed: October 17, 1990
    Date of Patent: March 2, 1993
    Assignee: The Proctor & Gamble Co.
    Inventors: Carlisle M. Herron, David J. Cooper, Thomas R. Hanser, Bart S. Hersko