Patents by Inventor Henry Stogner

Henry Stogner 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).

  • Manufacture of cellulose esters: recycle of caustic and/or acid from pre-treatment of pulp
    Publication number: 20070167618
    Abstract: A process for the manufacture of cellulose esters is described. The process includes the steps of: pre-treating pulp for the removal of impurities with either caustic or acid or both, esterifying the pre-treated pulp, and recycling the caustic or acid or both from the pre-treating step.
    Type: Application
    Filed: January 13, 2006
    Publication date: July 19, 2007
    Inventors: Linfu Wang, Henry Stogner, Denis Fallon, Lawton Kizer, Charles Toney, Billy Batson
  • Preparation of wood pulps with caustic pretreatment for use in the manufacture of cellulose acetates and other organic esters
    Publication number: 20060287517
    Abstract: A process for making cellulose acetate or cellulose esters which pretreats a wood pulp prior to acetylation or esterification is disclosed. The pretreatment of the wood pulp includes the mixture of wood pulp into a caustic solution to form a suspension of wood pulp. The suspension of wood pulp is separated from the caustic solution to form a cake. The cake is washed with an acid to obtain an acid and cellulose cake having a low water content. The acid and cellulose cake is then acetylated or esterifed to form cellulose acetate or other cellulose esters.
    Type: Application
    Filed: June 16, 2005
    Publication date: December 21, 2006
    Inventors: Linfu Wang, Henry Stogner, Charles Toney, Chuck Kizer, Bill Batson