Patents by Inventor Xiangsheng Meng

Xiangsheng Meng 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).

  • Process for preparation of 1,3-propanediol
    Publication number: 20050283029
    Abstract: Disclosed is a process for hydrogenating 3-hydroxypropionic acid, or esters thereof, or mixtures of the acid and the ester, in a liquid phase, in the presence of a ruthenium catalyst, alone, or in combination with at least one or more additional metal catalyst wherein the metal is molybdenum, tungsten, titanium, zirconium, niobium, vanadium, chromium, or mixtures of the metals.
    Type: Application
    Filed: October 30, 2003
    Publication date: December 22, 2005
    Inventors: Xiangsheng Meng, Timothy Abraham, Paraskevas Tsobanakis
  • Methods of manufacturing derivatives of beta-hydroxycarboxylic acids
    Publication number: 20050221457
    Abstract: Preparation of derivatives of ?-hydroxycarboxylic acid, including ?-hydroxycarboxylic acid esters, ?,?-unsaturated carboxylic acids, esters of ?,?-unsaturated carboxylic acid, and alkoxy derivatives.
    Type: Application
    Filed: March 25, 2003
    Publication date: October 6, 2005
    Inventors: Paraskevas Tsobanakis, Xiangsheng Meng, Timothy Abraham
  • Process for preparing carboxylic acids and derivatives thereof
    Publication number: 20040210087
    Abstract: Processes for preparing carboxylic acids and derivatives thereof in which an ammonium salt of the carboxylic acid is heated in the presence of an organic reagent to split the salt and form the acid or, where the organic reagent is an esterifying agent, the corresponding ester. Both the acid and the ester may be dehydrated to form unsaturated counterparts.
    Type: Application
    Filed: June 3, 2004
    Publication date: October 21, 2004
    Inventors: Xiangsheng Meng, Paraskevas Tsobanakis, Jeffrey Malsam, Timothy W Abraham