Patents by Inventor Andrew C. Arthur

Andrew C. Arthur 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 of removing alkylene halogenohydrin from cellulose ether
    Patent number: 9156919
    Abstract: In a method of removing alkylene halogenohydrin from a cellulose ether the cellulose ether is provided, water is added to the cellulose ether and subsequently alkylene halogenohydrin and water is removed from the cellulose ether by evaporation. Alternatively steam or a steam mixture can be sparged across or through the cellulose ether to remove halogenohydrin from the cellulose ether.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: October 13, 2015
    Inventors: Richard A. Engelman, David W. Ziettlow, Robert E. Scheid, Jr., Charles B. Mallon, Matthias Sprehe, Andrew C. Arthur
  • PROCESS FOR PREPARING AN ESTER OF A CELLULOSE ETHER IN THE PRESENCE OF AN ALIPHATIC CARBOXYLIC ACID
    Publication number: 20150218197
    Abstract: Two or more esters of a cellulose ether, each having the same ether and ester substituents but different weight average molecular weights are prepared in a process which comprises the steps of esterifying a cellulose ether with (i) an aliphatic monocarboxylic acid anhydride or (ii) a dicarboxylic acid anhydride or (iii) a combination of an aliphatic monocarboxylic acid anhydride and a dicarboxylic acid anhydride in the presence of an aliphatic carboxylic acid as a reaction diluent in two or more separate reactions, wherein in each reaction a different molar ratio [aliphatic carboxylic acid/anhydroglucose units of cellulose ether] is used to produce esters of the cellulose ether of different weight average molecular weights.
    Type: Application
    Filed: August 15, 2013
    Publication date: August 6, 2015
    Inventors: Oliver Petermann, Matthias Sprehe, Robert L. Schmitt, Andrew C. Arthur, Warren K. Miller, David K. Lyon
  • METHOD OF REMOVING ALKYLENE HALOGENOHYDRIN FROM CELLULOSE ETHER
    Publication number: 20140148591
    Abstract: In a method of removing alkylene halogenohydrin from a cellulose ether the cellulose ether is provided, water is added to the cellulose ether and subsequently alkylene halogenohydrin and water is removed from the cellulose ether by evaporation. Alternatively steam or a steam mixture can be sparged across or through the cellulose ether to remove halogenohydrin from the cellulose ether.
    Type: Application
    Filed: July 17, 2012
    Publication date: May 29, 2014
    Applicant: Dow Global Technologies LLC
    Inventors: Richard A Engleman, David W. Ziettlow, Robert E. Scheid, JR., Charles B. Mallon, Matthias Sprehe, Andrew C. Arthur