Patents by Inventor Sirisoma Wanigatunga
Sirisoma Wanigatunga 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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Patent number: 7732507Abstract: Spirotetrathiocarbamates (STOCs) or oxa substituted compounds (SOTOCs) of Formula I: Formula (I) or bisSTOC or bisSOTOC compounds of Formula II: Formula (II) wherein X1, X2, X3, X4, X5, X6, X7, and X8, are independently O or S; and preferably at least two and up to all four of X1, X2, X3 and X4, and at least two and up to all four of X5, X6, X7, and X8 are sulfur; Z is —CmR22m wherein m=1 to 4; —C(R2)2SC(R2)2—, C(R2)2SSC(R2)2—, or —C(R2)OC(R2)2; n is from 0 to 4; M is selected from CH2Cl, CH2SC(O)R1, CH2SC(S)R1, CH2S(CH2CH2S)qH wherein q is 0, 1 or 2; —CR2?CH2, —CH2OC(O)CR2?CH2, CH2N?C?S, CH2N?C?O, CH2NR2H, CH2OH, CH2SCH2CH2CR2?CH2, phenyl, C(R2)phenyl, furan, thiophene, halogen, C3-C6 cycloalkyl, C3-C6 heretocyclics, thiol, H, (III) or (IV) wherein A is S, O or phenyl; x is 0 or 1; R1 is C1-C22 alkyl; and R2 is H or C1-C22 alkyl have excellent optical properties. Methods for preparing these compositions and optical lenses prepared from the compounds are also provided.Type: GrantFiled: December 19, 2003Date of Patent: June 8, 2010Assignee: Essilor International Compagnie Generale d'OptiqueInventors: Aref Jallouli, Martin Rickwood, Kimberly Morgan, Sirisoma Wanigatunga
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Patent number: 7446228Abstract: Disclosed is a thiosphosphine compound of formula: wherein X represents with R1 being H or —CH3, R and R? represent, independently from each other, an alkyl radical, an alkoxy radical, an aryl radical or a phenyl radical which may be substituted with one or more alkyl and/or alkoxy groups, n is an integer from 0 to 4, n? is an integer from 0 to 5, x is an integer from 0 to 2, y is an integer from 1 to 5 with the proviso that y+n is an integer from 1 to 5. The compounds can be used to make optically transparent articles such as ophthalmic lenses.Type: GrantFiled: October 20, 2006Date of Patent: November 4, 2008Assignee: Essilor International Compagnie Generale d'OptiqueInventors: Sirisoma Wanigatunga, Aref Jallouli, Martin Rickwood, Yassin Yusef Turshani
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Patent number: 7378556Abstract: Disclosed is a process for making a thiophosphine compound of formula (I): wherein X represents SH or with R1 being H or —CH3, R and R? represent, independently from each other, an alkyl radical, an alkoxy radical, an aryl radical or a phenyl radical which may be substituted with one or more alkyl and/or alkoxy groups, n is an integer from 0 to 4, n? is an integer from 0 to 5, x is an integer from 0 to 2, y is an integer from 1 to 5 with the proviso that y+n is an integer from 1 to 5, wherein y =1, X is in para position with regard to phosphorus and represents SH.Type: GrantFiled: October 20, 2006Date of Patent: May 27, 2008Assignee: Essilor International Compagnie Generale d'OptiqueInventors: Sirisoma Wanigatunga, Aref Jallouli, Martin Rickwood, Yassin Yusef Turshani
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Publication number: 20080103230Abstract: Spirotetrathiocarbamates (STOCs) or oxa substituted compounds (SOTOCs) of Formula I: Formula (I) or bisSTOC or bisSOTOC compounds of Formula II: Formula (II) wherein X1, X2, X3, X4, X5, X6, X7, and X8, are independently O or S; and preferably at least two and up to all four of X1, X2, X3 and X4, and at least two and up to all four of X5, X6, X7, and X8 are sulfur; Z is —CmR22m wherein m=1 to 4; —C(R2)2SC(R2)2—, C(R2)2SSC(R2)2—, or —C(R2)OC(R2)2; n is from 0 to 4; M is selected from CH2Cl, CH2SC(O)R1, CH2SC(S)R1, CH2S(CH2CH2S)qH wherein q is 0, 1 or 2; —CR2?CH2, —CH2OC(O)CR2?CH2, CH2N?C?S, CH2N?C?O, CH2NR2H, CH2OH, CH2SCH2CH2CR2?CH2, phenyl, C(R2)phenyl, furan, thiophene, halogen, C3-C6 cycloalkyl, C3-C6 heretocyclics, thiol, H, (III) or (IV) wherein A is S, O or phenyl; x is 0 or 1; R1 is C1-C22 alkyl; and R2 is H or C1-C22 alkyl have excellent optical properties. Methods for preparing these compositions and optical lenses prepared from the compounds are also provided.Type: ApplicationFiled: December 19, 2003Publication date: May 1, 2008Applicant: Essilor International Compagnie Generale d'OptiqueInventors: Aref Jallouli, Martin Rickwood, Kimberly Morgan, Sirisoma Wanigatunga
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Publication number: 20070232834Abstract: Thiophosphine compounds (also named phosphine sulfide compounds) and their use for making polymerizable compositions which after polymerization give optically transparent articles, such as ophthalmic lenses, having improved mechanical and optical properties and in particular having an improved UV cut.Type: ApplicationFiled: October 20, 2006Publication date: October 4, 2007Applicant: Essilor International Compagnie Generale d'OptiqueInventors: Sirisoma Wanigatunga, Aref Jallouli, Martin Rickwood, Yassin Turshani
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Publication number: 20070232835Abstract: Thiophosphine compounds (also named phosphine sulfide compounds) and their use for making polymerizable compositions which after polymerization give optically transparent articles, such as ophthalmic lenses, having improved mechanical and optical properties and in particular having an improved UV cut.Type: ApplicationFiled: October 20, 2006Publication date: October 4, 2007Applicant: Essilor International Compagnie Generale d'OptiqueInventors: Sirisoma Wanigatunga, Aref Jallouli, Martin Rickwood, Yassin Turshani
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Patent number: 7253213Abstract: The invention relates to a process for polymerising a monomer, polymerizing and/or crosslinking an oligomer, or crosslinking a polymer or copolymer, said monomer, oligomer, polymer and copolymer being selected among precursor monomers, urethane, thiourethane and episulfide oligomers, and urethane, thiourethane and episulfide polymers and copolymers, which comprises: (a) adding to precursor monomers or oligomers or polymers or copolymers an effective amount of at least one complex of Co, Mo or W which under irradiation conditions photochemically reacts to release at least one anionically charged nucleophile or uncharged Lewis base; and (b) irradiating the mixture of (a) to release the at least one anionically charged nucleophile or uncharged Lewis base to initiate polymerisation and/or crosslinking of the monomer, oligomer, polymer or copolymer.Type: GrantFiled: April 26, 2005Date of Patent: August 7, 2007Inventors: Charles R. Kutal, Sirisoma Wanigatunga, Gabriel Keita, Yassin Turshani
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Patent number: 7129321Abstract: Thiophosphine compounds (also named phosphine sulfide compounds) and their use for making polymerizable compositions which after polymerization give optically transparent articles, such as ophthalmic lenses, having improved mechanical and optical properties and in particular having an improved UV cut.Type: GrantFiled: March 24, 2004Date of Patent: October 31, 2006Assignee: Essilor International Compagnie Generale d'OptiqueInventors: Sirisoma Wanigatunga, Aref Jallouli, Martin Rickwood, Yassin Yusef Turshani
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Publication number: 20050203200Abstract: The invention relates to a process for polymerising a monomer, polymerizing and/or crosslinking an oligomer, or crosslinking a polymer or copolymer, said monomer, oligomer, polymer and copolymer being selected among precursor monomers, urethane, thiourethane and episulfide oligomers, and urethane, thiourethane and episulfide polymers and copolymers, which comprises: (a) adding to precursor monomers or oligomers or polymers or copolymers an effective amount of at least one complex of Co, Mo or W which under irradiation conditions photochemically reacts to release at least one anionically charged nucleophile or uncharged Lewis base; and (b) irradiating the mixture of (a) to release the at least one anionically charged nucleophile or uncharged Lewis base to initiate polymerisation and/or crosslinking of the monomer, oligomer, polymer or copolymer.Type: ApplicationFiled: April 26, 2005Publication date: September 15, 2005Inventors: Charles Kutal, Sirisoma Wanigatunga, Gabriel Keita, Yassin Turshani
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Patent number: 6911485Abstract: The invention relates to a process for polymerising a monomer, polymerizing and/or crosslinking a oligomer, or crosslinking a polymer or copolymer, said monomer, oligomer, polymer and copolymer being selected among precursor monomers, urethane, thiourethane and episulfide oligomers, and urethane, thiourethane and episulfide polymers and copolymers, which comprises: (a) adding to precursor monomers or oligomers or polymers or copolymers an effective amount of at least one complex of Co, Mo or W which under irradiation conditions photochemically reacts to release at least one anionically charged nucleophile or uncharged Lewis base; and (b) irridiating the mixture of (a) to release the at least one anionically charged nucleophile or uncharged Lewis base to initiate polymerisation and/or crosslinking of the monomer, oligomer, polymer or copolymer.Type: GrantFiled: April 19, 2002Date of Patent: June 28, 2005Assignees: The University of Georgia Research Foundation, Inc., Essilor International Campagnie Generale D'OptiqueInventors: Charles R. Kutal, Sirisoma Wanigatunga, Gabriel Keita, Yassin Turshani
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Publication number: 20050107579Abstract: Thiophosphine compounds (also named phosphine sulfide compounds) and their use for making polymerizable compositions which after polymerization give optically transparent articles, such as ophthalmic lenses, having improved mechanical and optical properties and in particular having an improved UV cut.Type: ApplicationFiled: March 24, 2004Publication date: May 19, 2005Applicant: Essilor International Compagnie Generale d'OptiqueInventors: Sirisoma Wanigatunga, Aref Jallouli, Martin Rickwood, Yassin Turshani
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Patent number: 6635195Abstract: A process for polymerizing/curing a photopolymerizable monomer composition comprising at least one diepisulfide monomer which comprises the steps of: a) mixing to the monomer composition an effective amount of a cationic photopolymerization initiator, and b) irradiating the mixture of a) with an ultraviolet radiation to at least partially cationically photopolymerize the monomer composition.Type: GrantFiled: February 4, 2000Date of Patent: October 21, 2003Assignee: Essilor International Compagnie Generale d'OptiqueInventors: Sirisoma Wanigatunga, Yassin Turshani
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Patent number: 6592801Abstract: A process for polymerizing episulfide monomers comprising the steps of: (c) mixing to an episulfide monomer or a mixture of episulfide monomers an effective amount of at least one photopolymerization catalyst selected from the group consisting of (cyclopentadienyl) ruthenium and osmium complexes and an effective amount of at least a co-catalyst selected from phosphonium salts, phosphines and amines; and (d) irradiating the mixture of (a) with an ultra-violet radiation to polymerize the mixture.Type: GrantFiled: April 30, 2001Date of Patent: July 15, 2003Assignee: Essilor International Compagnie Generale d'OptiqueInventors: Sirisoma Wanigatunga, Yassin Yusef Turshani, Peiqi Jiang
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Publication number: 20030022956Abstract: A process for polymerizing episulfide monomers comprising the steps of:Type: ApplicationFiled: April 30, 2001Publication date: January 30, 2003Inventors: Sirisoma Wanigatunga, Yassin Yusef Turshani, Peiqi Jiang
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Patent number: 6262299Abstract: A zwitterionic monomer having amino-multicarboxylic acid functionality having Structure (I) wherein R1 is selected from the group consisting of H, an alkyl group having 1 to 6 carbon atoms; R2 is (CH2)n where n is 2 to 12; R3 and R4 are independently an alkyl group having 1 to 6 carbon atoms; R5 is (CH2)m where m is 2 or 3; R6 and R7 are independently selected from wherein R20 is selected from the group consisting of H, CH3, and COOY; R21 is selected from H or CH3; X is oxygen or nitrogen; A is a halide; and Y is independently a cation. The zwitterionic monomer is the reaction product of an amino-multicarboxylic acid and an amine containing monomer.Type: GrantFiled: July 6, 1999Date of Patent: July 17, 2001Assignee: National Starch and Chemical Investment Holding CorporationInventors: John Tsai, Sirisoma Wanigatunga
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Patent number: 5501851Abstract: Hair fixative carboxylated polymers are stabilized in an aqueous emulsion by neutralization with a cosmetically acceptable organic or inorganic base, require no organic solvent, no propellant when dispensed in non-aerosol containers, and minimal organic propellant when dispensed in aerosol containers.Type: GrantFiled: September 12, 1994Date of Patent: March 26, 1996Assignee: National Starch and Chemical Investment Holding CorporationInventors: Paul R. Mudge, John C. Leighton, Sirisoma Wanigatunga, Natalie Morawsky
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Patent number: 5239008Abstract: A process for the emulsion polymerization of graft copolymers comprising the steps of: a) obtaining an unsaturated polymer containing terminal or pendant polymerizable functionalities; b) dissolving the resultant unsaturated polymer in an ethylenically unsaturated monomer in the presence of a surfactant in water to form an aqueous phase; c) microfluidizing the aqueous phase of (b) to a size of less than 0.5 u; and d) subsequently graft polymerizing a monomer with the unsaturated polymer in the microfluidized aqueous phase using free radical polymerization techniques; such that the graft polymerization reaction occurs within each micelle thereby resulting in uniform particles of the predetermined particle size.Type: GrantFiled: June 28, 1991Date of Patent: August 24, 1993Assignee: National Starch and Chemical Investment Holding CorporationInventors: Paul R. Mudge, Sirisoma Wanigatunga
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Patent number: 5030507Abstract: Emulsion binders which do not generate formaldehyde during cure are prepared for use in nonwoven products by using a emulsion copolymer comprising by weight about 100 parts C.sub.1 -C.sub.8 alkyl acrylate or C.sub.1 -C.sub.8 alkyl acrylates in combination with styrene, acrylonitrile, vinyl acetate and combinations thereof, about 1 to 20 parts hydroxyalkyl acrylate or methacrylate, about 2 to 20 parts meta or para isopropenyl-.alpha.,.alpha.-dimenthyl benyl isocyanate and optionally 0.1 to 5 parts of a multifunctional monomer. The binders are useful in the formation of heat resistant flexible products for use in roofing, flooring and filtering materials, as well as for facings and other applications in general purpose nonwoven products.Type: GrantFiled: January 12, 1990Date of Patent: July 9, 1991Assignee: National Starch and Chemical Investment Holding CorporationInventors: Paul Mudge, Sirisoma Wanigatunga
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Patent number: 4985511Abstract: Poly(siloxane-pivalolactone) thermoplastic elastomers and methods for their preparation by graft polymerizing pivalolactone onto a polysiloxane backbone.Type: GrantFiled: June 8, 1989Date of Patent: January 15, 1991Assignee: University of FloridaInventors: Kenneth B. Wagener, Sirisoma Wanigatunga