Patents by Inventor Hsiang-Wei Tsao

Hsiang-Wei Tsao 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 IODIDE REMOVAL
    Publication number: 20110086929
    Abstract: The present invention provides a method of reducing the concentration of an iodide compound using an ion exchange resin. The ion exchange resin is a macroporous resin having sulfur functional groups exchanged with silver, a dry weight capacity of at least 5.0 eq/kg, a mean pore diameter (D50) of about 400-800 ?, a pore volume of about 0.4-0.6 ml/g, and a surface area of about 20-40 m2/g.
    Type: Application
    Filed: July 16, 2010
    Publication date: April 14, 2011
    Applicant: Brotech Corporation, doing business as The Purolite Company
    Inventor: Hsiang Wei Tsao
  • Method of iodide removal
    Patent number: 7588690
    Abstract: The present invention provides a method of reducing the concentration of an iodide compound using an ion exchange resin. The ion exchange resin is a macroporous resin having sulfur functional groups exchanged with silver, a dry weight capacity of at least 5.0 eq/kg, a mean pore diameter (D50) of about 400-800 ?, a pore volume of about 0.4-0.6 ml/g, and a surface area of about 20-40 m2/g.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: September 15, 2009
    Assignee: The Purolite Company
    Inventor: Hsiang Wei Tsao
  • Removal of acidic impurities in processes for solvent extraction of aromatics from nonaromatics
    Patent number: 4919816
    Abstract: Corrosion of process equipment in a system for extraction of aromatic components from nonaromatic components by means of a selective solvent, for example tetraethylene glycol, is reduced by treating with anion exchange resin a stream composed mainly of water which has been used to wash residual solvent from the extracted aromatics.
    Type: Grant
    Filed: January 31, 1989
    Date of Patent: April 24, 1990
    Assignee: Sun Refining and Marketing Company
    Inventor: Hsiang-Wei Tsao
  • Process for removing arsine impurities in process streams
    Patent number: 4877920
    Abstract: A process for removing arsenic contaminants from a hydrocarbon fluid by contacting the fluid with copper oxide supported on activated carbon.
    Type: Grant
    Filed: June 8, 1988
    Date of Patent: October 31, 1989
    Assignee: Sun Refining and Marketing Company
    Inventors: Richard A. Lush, Hsiang-Wei Tsao
  • Preparation of 2-trifluoromethyl cinchoninic acids
    Patent number: 4267333
    Abstract: 2-Trifluoromethyl cinchoninic acids can be prepared in high yields by reaction of an alkali metal 2-aminophenylglyoxylate and 1,1,1-trifluoroacetone in the presence of a weak acid and a metal salt of a weak acid. Preferably reaction is effected by first hydrolyzing isatin, or a substituted isatin, in the presence of an alkali metal hydroxide to produce the alkali metal 2-aminophenylglyoxylate, and then reacting this intermediate product with 1,1,1-trifluoroacetone without isolating it from the reaction medium.
    Type: Grant
    Filed: September 26, 1979
    Date of Patent: May 12, 1981
    Assignee: Union Carbide Agricultural Products Company, Inc.
    Inventor: Hsiang-Wei Tsao
  • Vehicle sunshield
    Patent number: D348242
    Type: Grant
    Filed: December 31, 1992
    Date of Patent: June 28, 1994
    Inventor: Hsiang-Wei Tsao