Patents by Inventor Upali Weerasooriya

Upali Weerasooriya 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).

  • Publication number: 20170044423
    Abstract: Provided herein are inter alia novel compositions and methods having application in the field of enhanced oil recovery.
    Type: Application
    Filed: April 16, 2015
    Publication date: February 16, 2017
    Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Upali A. Weerasooriya, Gary A. Pope, Mukul M. Sharma, Jiajia Cai
  • Patent number: 9266821
    Abstract: A process for reacting, in the presence of a particular calcium containing catalyst, an amine having an active hydrogen and one or more of a fatty acid ester or a fatty acid.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: February 23, 2016
    Assignee: HARCROS CHEMICALS INC.
    Inventors: Upali Weerasooriya, John Boorem, Brian Hodle, Aaron Boorem, Peter Radford, Howard Stevenson, G. Gerald Barr
  • Publication number: 20110092715
    Abstract: A process for reacting, in the presence of a particular calcium containing catalyst, an amine having an active hydrogen and one or more of a fatty acid ester or a fatty acid.
    Type: Application
    Filed: October 16, 2009
    Publication date: April 21, 2011
    Inventors: Upali Weerasooriya, John Boorem, Brian Hodle, Aaron Boorem, Peter Radford, Howard Stevenson, G. Gerald Barr
  • Publication number: 20050240064
    Abstract: A process for preparing an alkoxylation catalyst suitable for alkoxylating compounds that includes mixing a calcium-containing compound in a dispersing medium having a boiling point less that 160° C. with a carboxylic acid and an inorganic acid or anhydride.
    Type: Application
    Filed: April 27, 2004
    Publication date: October 27, 2005
    Inventors: Upali Weerasooriya, James Bennett, Peter Radford
  • Patent number: 6268517
    Abstract: A process for producing a surfactant composition by partially saponifying an alkoxylated triglyceride having the formula: with an alkali metal hydroxide such as sodium hydroxide and in the presence of from 5 to 10% free water, removing water by heating and recovering a surfactant composition comprising soap and moisturizing agents comprised of alkoxylated monoglycerides and unreacted alkoxylated triglycerides.
    Type: Grant
    Filed: May 9, 2000
    Date of Patent: July 31, 2001
    Assignee: Condea Vista Company
    Inventors: Paul A. Filler, Elida G. Partain, Upali Weerasooriya
  • Publication number: 20010009927
    Abstract: A surfactant composition useful in soil remediation comprising compounds having the structure: 1
    Type: Application
    Filed: January 6, 1999
    Publication date: July 26, 2001
    Inventors: UPALI WEERASOORIYA, LARRY N. BRITTON, ALLEN M. NIELSEN, STEVE V. ORSAK, FRANK GATES
  • Patent number: 6147246
    Abstract: A process for alkoxylating an organic carbonate wherein an alkylene oxide is reacted with an organic carbonate such as a dialkyl carbonate in the presence of a catalytically effective amount of a calcium-containing catalyst to produce alkoxylated carbonates.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: November 14, 2000
    Assignee: Condea Vista Company
    Inventors: Upali Weerasooriya, K. Lee Matheson, Dewey L. Smith, Paul A. Filler, Elida G. Partain, Kelly D. Knouse, Janet L. Watson
  • Patent number: 6020509
    Abstract: A process for producing a surfactant composition by partially saponifying an alkoxylated triglyceride having the formula: ##STR1## with an alkali metal hydroxide such as sodium hydroxide and recovering a surfactant composition comprising soap and moisturizing agents comprised of alkoxylated monoglycerides and unreacted alkoxylated triglycerides.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: February 1, 2000
    Assignee: Condea Vista Company
    Inventors: Upali Weerasooriya, Paul A. Filler, Janet L. Watson
  • Patent number: 5847210
    Abstract: Disclosed are processes for the production of compounds of formula I ##STR1## comprising reacting the alkylarylsulfonyl chloride with an N-alkylglucamine. The compounds are useful surfactants.
    Type: Grant
    Filed: September 19, 1997
    Date of Patent: December 8, 1998
    Assignee: Condea Vista Company
    Inventors: John Lin, Upali Weerasooriya, Paul A. Filler
  • Patent number: 5750749
    Abstract: A process for preparing a surfactant composition comprising reacting an N-alkylpolyhydroxyamine and an alkoxylated triglyceride of a fatty acid to produce a mixture of a polyhydroxy-fatty amide, an alkoxylated monoglyceride of a fatty acid, and an alkoxylated diglyceride of a fatty acid, the resulting mixture providing a water soluble surfactant composition.
    Type: Grant
    Filed: February 9, 1996
    Date of Patent: May 12, 1998
    Assignee: CONDEA Vista Company
    Inventors: Upali Weerasooriya, John Lin
  • Patent number: 5731461
    Abstract: Disclosed are surfactant compositions comprising a compound of formula I ##STR1## wherein R is an alkyl group having 6 to 20 carbon atoms, R.sub.1 is a short chain alkyl group and Ar is an aryl group having 6 carbon atoms.
    Type: Grant
    Filed: January 3, 1996
    Date of Patent: March 24, 1998
    Assignee: Condea Vista Company
    Inventors: John Lin, Upali Weerasooriya, Paul A. Filler
  • Patent number: 5627121
    Abstract: A process for preparing an alkoxylation catalyst suitable for alkoxylating compounds such as active hydrogen-containing compounds wherein an alkoxylated alcohol mixture, a calcium-containing compound that is at least partially dispersible in the alkoxylated alcohol mixture, and a carboxylic acid are mixed together to produce a calcium-containing composition having titratable alkalinity, the composition being obtained under conditions to prevent loss of water, the composition being at least partially neutralized with an inorganic acid under conditions to prevent loss of water to produce a partially neutralized calcium-containing catalyst.
    Type: Grant
    Filed: June 15, 1995
    Date of Patent: May 6, 1997
    Assignee: Condea Vista Company
    Inventors: John Lin, Upali Weerasooriya, Bruce E. Leach, Steve V. Orsak
  • Patent number: 5498753
    Abstract: A process for producing alkali metal isethionate ethoxylates by reacting an alkali metal isethionate and a polyol, the mole ratio of polyol to alkali metal isethionate being greater than about 7:1, the reaction mixture produced being neutralized with a non-oxidizing inorganic acid to produce a neutralized reaction mixture from which the alkali metal isethionate ethoxylate is recovered.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: March 12, 1996
    Assignee: Vista Chemical Company
    Inventors: Upali Weerasooriya, John Lin, Janet L. Watson
  • Patent number: 5488148
    Abstract: A process for sulfonating internal olefins wherein a dilute solution of the internal olefins in an inert hydrocarbon solvent is sulfonated to produce a reaction mixture containing intermediate sulfonated compounds, the intermediate sulfonated compounds in the reaction mixture being neutralized under conditions to form neutralized sulfonated compounds, the neutralized sulfonated compounds in the reaction mixture being hydrolyzed to form a product mixture containing hydroxy alkane sulfonates and alkene sulfonates that are then recovered.
    Type: Grant
    Filed: September 1, 1993
    Date of Patent: January 30, 1996
    Assignee: Vista Chemical Company
    Inventors: Upali Weerasooriya, John Lin, K. Lee Matheson, Donald T. Robertson, Janet L. Watson, LeAnn M. Rowe
  • Patent number: 5386045
    Abstract: A process for producing alkoxylated mono-, di-, and tri-esters in which a starting material ester and an alkylene oxide are reacted in the presence of selected calcium based catalysts.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: January 31, 1995
    Assignee: Vista Chemical Company
    Inventors: Upali Weerasooriya, Donald T. Robertson, John Lin, Bruce E. Leach, Cynthia L. Aeschbacher, Tonyette S. Sandoval
  • Patent number: 5352842
    Abstract: A process for clarifying an alkoxylated product mixture produced using a calcium-based catalyst wherein the product mixture is heated to a temperature of from about 80.degree. C. to about 175.degree. C. to produce a filtration feed, the filtration feed being passed through a filter medium comprising material possessing polar groups to produce a clarified filtrate, the filtration feed being passed through the filter medium within about 5 days of being prepared, the filtration feed being passed through the filter medium until the desired degree of clarification is obtained, the temperature of the clarified filtrate being less than about 30.degree. C. but above the pour point of the clarified filtrate.
    Type: Grant
    Filed: March 30, 1993
    Date of Patent: October 4, 1994
    Assignee: Vista Chemical Company
    Inventors: Upali Weerasooriya, Steve V. Orsak, Clint Osborne, John Lin, Mark W. Hellums, Linton LeCompte, David A. Riley
  • Patent number: 5220046
    Abstract: A process for producing alkoxylated methyl esters to produce a narrow homolog distribution of the alkoxylate species in which a staring material methyl ester and an alkylene oxide are reacted in the presence of selected calcium based catalysts.
    Type: Grant
    Filed: August 22, 1991
    Date of Patent: June 15, 1993
    Assignee: Vista Chemical Company
    Inventors: Bruce E. Leach, John Lin, Cynthia L. Aeschbacher, Donald T. Robertson, Tonyette S. Sandoval, Upali Weerasooriya