Patents by Inventor Daren B. Pietsch

Daren B. Pietsch 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 manufacturing cellulose fiber reinforced composites having reduced discoloration and improved dispersion
    Publication number: 20040140592
    Abstract: The present invention provides composites prepared from melt blending compositions that generally include cellulosic pulp fibers having an alpha-cellulose purity of greater than 80% by weight, at least one water soluble binder, at least one lubricant, at least one compatibilizer, and at least one matrix polymer. The present invention further provides advantageous temperature profiles and feeding arrangements to be used in conjunction with the melt blending of such composites. The composites of the present invention exhibit reduced discoloration and improved fiber dispersion.
    Type: Application
    Filed: January 6, 2004
    Publication date: July 22, 2004
    Applicant: Rayonier Products and Financial Services Company
    Inventors: Fred Barlow, Yash Khanna, Daren B. Pietsch, John Underwood
  • Cellulose fiber reinforced composites having reduced discoloration and improved dispersion and associated methods of manufacture
    Patent number: 6743507
    Abstract: The present invention provides composites prepared from melt blending compositions that generally include cellulosic pulp fibers having an alpha-cellulose purity of greater than 80% by weight, at least one water soluble binder, at least one lubricant, at least one compatibilizer, and at least one matrix polymer. The present invention further provides advantageous temperature profiles and feeding arrangements to be used in conjunction with the melt blending of such composites. The composites of the present invention exhibit reduced discoloration and improved fiber dispersion.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: June 1, 2004
    Assignee: Rayonier Products and Financial Services Company
    Inventors: Fred Barlow, Yash Khanna, Daren B. Pietsch, John Underwood
  • Cellulose fiber reinforced composites having reduced discoloration and improved dispersion and associated methods of manufacture
    Publication number: 20030228454
    Abstract: The present invention provides composites prepared from melt blending compositions that generally include cellulosic pulp fibers having an alpha-cellulose purity of greater than 80% by weight, at least one water soluble binder, at least one lubricant, at least one compatibilizer, and at least one matrix polymer. The present invention further provides advantageous temperature profiles and feeding arrangements to be used in conjunction with the melt blending of such composites. The composites of the present invention exhibit reduced discoloration and improved fiber dispersion.
    Type: Application
    Filed: June 7, 2002
    Publication date: December 11, 2003
    Applicant: Rayonier, Inc.
    Inventors: Fred Barlow, Yash Khanna, Daren B. Pietsch, John Underwood
  • Apparatus for production of cellulose acetate
    Publication number: 20030223923
    Abstract: A portable reaction system for acetylating cellulose to cellulose acetate comprising a skid-mounted acetylator, hydrolysis cell and hoist system is disclosed. The acetylator is pivotably mounted on the skid and is constructed so that its content can be transferred when the acetylator is pivoted. The hydrolysis cell is removably mounted on the skid and is adapted so that it can be lifted with the hoist system and moved to a position adjacent to acetylator to receive the contents of the acetylator when the acetylator is pivoted.
    Type: Application
    Filed: June 3, 2002
    Publication date: December 4, 2003
    Inventors: Phil P. Aspinwall, Melinda K. Chancey, Daren B. Pietsch