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).
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Publication number: 20220025247Abstract: Provided herein are compounds, compositions, and methods having application in the field of enhanced oil recovery (EOR). In particular, the compounds, compositions, and methods provided can be used for the recovery of a large range of crude oil compositions from challenging reservoirs.Type: ApplicationFiled: April 4, 2019Publication date: January 27, 2022Inventors: Upali WEERASOORIYA, Kishore K. MOHANTY, Krishna PANTHI, Himanshu SHARMA, Pinaki GHOSH, Ryosuke OKUNO, Kwang Hoon BAEK, Gayan Aruna ABEYKOON
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Publication number: 20210238470Abstract: Provided herein are compounds, compositions, and methods having application in the field of enhanced oil recovery (EOR). In particular, the compounds, compositions, and methods provided can be used for the recovery of a large range of crude oil compositions from challenging reservoirs.Type: ApplicationFiled: April 4, 2019Publication date: August 5, 2021Inventors: Upali WEERASOORIYA, Kishore K. MOHANTY, Krishna PANTHI, Himanshu SHARMA, Pinaki GHOSH, Ryosuke OKUNO, Kwang Hoon BAEK, Gayan Aruna ABEYKOON
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Publication number: 20210039060Abstract: The present invention is directed to surfactants with small hydrophobes, which are of non-conventional hydrophobe size. The surfactants of the present invention utilize a small hydrophobic moiety with a polvalkoxylate chain comprising PO, BO and/or EO groups, with optional ionic groups, such as anionic, cationic and zwitterionic, to achieve the desired hydrophilic-lipophilic balance (HLB). The present invention is further directed to formulations comprising the surfactants of the invention, and methods of using the surfactants of the invention, including in enhanced oil recovery applications.Type: ApplicationFiled: April 4, 2018Publication date: February 11, 2021Inventors: UPALI WEERASOORIYA, PETER RADFORD, KEVIN SIKKEMA, JOHN BOOREM, AARON BOOREM, KURT CHESHIRE, KISHORE K. MOHANTY, KRISHNA PANTHI, HIMANSHU SHARMA, PINAKI GHOSH
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Publication number: 20170044423Abstract: Provided herein are inter alia novel compositions and methods having application in the field of enhanced oil recovery.Type: ApplicationFiled: April 16, 2015Publication date: February 16, 2017Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEMInventors: Upali A. Weerasooriya, Gary A. Pope, Mukul M. Sharma, Jiajia Cai
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Patent number: 9266821Abstract: 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: GrantFiled: October 16, 2009Date of Patent: February 23, 2016Assignee: HARCROS CHEMICALS INC.Inventors: Upali Weerasooriya, John Boorem, Brian Hodle, Aaron Boorem, Peter Radford, Howard Stevenson, G. Gerald Barr
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Publication number: 20110092715Abstract: 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: ApplicationFiled: October 16, 2009Publication date: April 21, 2011Inventors: Upali Weerasooriya, John Boorem, Brian Hodle, Aaron Boorem, Peter Radford, Howard Stevenson, G. Gerald Barr
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Publication number: 20050240064Abstract: 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: ApplicationFiled: April 27, 2004Publication date: October 27, 2005Inventors: Upali Weerasooriya, James Bennett, Peter Radford
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Patent number: 6268517Abstract: 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: GrantFiled: May 9, 2000Date of Patent: July 31, 2001Assignee: Condea Vista CompanyInventors: Paul A. Filler, Elida G. Partain, Upali Weerasooriya
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Publication number: 20010009927Abstract: A surfactant composition useful in soil remediation comprising compounds having the structure: 1Type: ApplicationFiled: January 6, 1999Publication date: July 26, 2001Inventors: UPALI WEERASOORIYA, LARRY N. BRITTON, ALLEN M. NIELSEN, STEVE V. ORSAK, FRANK GATES
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Patent number: 6147246Abstract: 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: GrantFiled: December 23, 1999Date of Patent: November 14, 2000Assignee: Condea Vista CompanyInventors: Upali Weerasooriya, K. Lee Matheson, Dewey L. Smith, Paul A. Filler, Elida G. Partain, Kelly D. Knouse, Janet L. Watson
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Patent number: 6020509Abstract: 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: GrantFiled: December 22, 1998Date of Patent: February 1, 2000Assignee: Condea Vista CompanyInventors: Upali Weerasooriya, Paul A. Filler, Janet L. Watson
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Patent number: 5847210Abstract: 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: GrantFiled: September 19, 1997Date of Patent: December 8, 1998Assignee: Condea Vista CompanyInventors: John Lin, Upali Weerasooriya, Paul A. Filler
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Patent number: 5750749Abstract: 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: GrantFiled: February 9, 1996Date of Patent: May 12, 1998Assignee: CONDEA Vista CompanyInventors: Upali Weerasooriya, John Lin
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Patent number: 5731461Abstract: 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: GrantFiled: January 3, 1996Date of Patent: March 24, 1998Assignee: Condea Vista CompanyInventors: John Lin, Upali Weerasooriya, Paul A. Filler
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Patent number: 5627121Abstract: 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: GrantFiled: June 15, 1995Date of Patent: May 6, 1997Assignee: Condea Vista CompanyInventors: John Lin, Upali Weerasooriya, Bruce E. Leach, Steve V. Orsak
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Patent number: 5498753Abstract: 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: GrantFiled: April 25, 1994Date of Patent: March 12, 1996Assignee: Vista Chemical CompanyInventors: Upali Weerasooriya, John Lin, Janet L. Watson
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Patent number: 5488148Abstract: 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: GrantFiled: September 1, 1993Date of Patent: January 30, 1996Assignee: Vista Chemical CompanyInventors: Upali Weerasooriya, John Lin, K. Lee Matheson, Donald T. Robertson, Janet L. Watson, LeAnn M. Rowe
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Patent number: 5386045Abstract: 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: GrantFiled: August 5, 1992Date of Patent: January 31, 1995Assignee: Vista Chemical CompanyInventors: Upali Weerasooriya, Donald T. Robertson, John Lin, Bruce E. Leach, Cynthia L. Aeschbacher, Tonyette S. Sandoval
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Patent number: 5352842Abstract: 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: GrantFiled: March 30, 1993Date of Patent: October 4, 1994Assignee: Vista Chemical CompanyInventors: Upali Weerasooriya, Steve V. Orsak, Clint Osborne, John Lin, Mark W. Hellums, Linton LeCompte, David A. Riley
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Patent number: 5220046Abstract: 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: GrantFiled: August 22, 1991Date of Patent: June 15, 1993Assignee: Vista Chemical CompanyInventors: Bruce E. Leach, John Lin, Cynthia L. Aeschbacher, Donald T. Robertson, Tonyette S. Sandoval, Upali Weerasooriya