Sirisoma Wanigatunga from 205 Chadwick Ct, Yorktown, VA 23693, age 74, Phone: 757 766-2288

Photopolymerization Of Episulfides Using Metal Complexes And Its Use For Making Ophthalmic Lenses
view source
US Patent:

6592801, Jul 15, 2003
Filed:

Apr 30, 2001
Appl. No.:

09/846669
Inventors:

Sirisoma Wanigatunga - Largo FL
Yassin Yusef Turshani - Largo FL
Peiqi Jiang - Palm Harbor FL
Assignee:

Essilor International Compagnie Generale dOptique - Charenton cedex
International Classification:

C08G 7508
US Classification:

264496, 522 25, 522 28, 522 29, 522168, 522169
Abstract:

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.

Cationic Photopolymerization Of Diepisulfides And Application To The Manufacture Of Optical Lenses
view source
US Patent:

6635195, Oct 21, 2003
Filed:

Feb 4, 2000
Appl. No.:

09/499070
Inventors:

Sirisoma Wanigatunga - Largo FL
Yassin Turshani - Largo FL
Assignee:

Essilor International Compagnie Generale dOptique - Charenton cedex
International Classification:

B29D 1100
US Classification:

264 11, 522 25, 522 27, 522168, 528377, 528378, 528380, 264494, 264496
Abstract:

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.

Anionic And Lewis Base Photopolymerization Process And Its Use For Making Optical Articles
view source
US Patent:

6911485, Jun 28, 2005
Filed:

Apr 19, 2002
Appl. No.:

10/126572
Inventors:

Charles R. Kutal - Athens GA, US
Sirisoma Wanigatunga - Largo FL, US
Gabriel Keita - Oldsmar FL, US
Yassin Turshani - Largo FL, US
Assignee:

The University of Georgia Research Foundation, Inc. - Athens GA
Essilor International Campagnie Generale D'Optique - Charenton Cedex
International Classification:

C08F002/48
C08F004/52
C08F004/78
G03C001/735
G03F007/029
US Classification:

522 49, 522 57, 522 62, 522 65, 522 66, 522174, 522180, 522173, 522182
Abstract:

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:.

Thiophosphine Compounds And Methods Of Making Polymerizable Compositions Containing Them And Their Use For Making Ophthalmic Lenses
view source
US Patent:

7129321, Oct 31, 2006
Filed:

Mar 24, 2004
Appl. No.:

10/807742
Inventors:

Sirisoma Wanigatunga - Clearwater FL, US
Aref Jallouli - Largo FL, US
Martin Rickwood - Clarks Green PA, US
Yassin Yusef Turshani - Largo FL, US
Assignee:

Essilor International Compagnie Generale d'Optique - Charenton Cedex
International Classification:

C08G 79/02
US Classification:

528398, 528373, 528389, 528487
Abstract:

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.

Anionic And Lewis Base Photopolymerization Process And Its Use For Making Optical Articles
view source
US Patent:

7253213, Aug 7, 2007
Filed:

Apr 26, 2005
Appl. No.:

11/114753
Inventors:

Charles R. Kutal - Athens GA, US
Sirisoma Wanigatunga - Largo FL, US
Gabriel Keita - Oldsmar FL, US
Yassin Turshani - Largo FL, US
International Classification:

C07F 11/00
C07F 15/00
C08J 3/28
US Classification:

522 57, 522 60, 522 63, 522 65, 522 66, 556 58, 556 59, 556138, 556140
Abstract:

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:.

Process For Making Thiophosphine Compounds
view source
US Patent:

7378556, May 27, 2008
Filed:

Oct 20, 2006
Appl. No.:

11/551439
Inventors:

Sirisoma Wanigatunga - Largo FL, US
Aref Jallouli - Largo FL, US
Martin Rickwood - Clarks Summit PA, US
Yassin Yusef Turshani - Largo FL, US
Assignee:

Essilor International Compagnie Generale d'Optique - Charenton Cedex
International Classification:

C07F 9/02
US Classification:

568 14, 568 15
Abstract:

Disclosed is a process for making a thiophosphine compound of formula (I):.

Spirotetrathiocarbamates And Spirooxothiocarbamates
view source
US Patent:

7732507, Jun 8, 2010
Filed:

Dec 19, 2003
Appl. No.:

10/540176
Inventors:

Aref Jallouli - Largo FL, US
Martin Rickwood - Clarks Green PA, US
Kimberly Morgan - Moosic PA, US
Sirisoma Wanigatunga - Largo FL, US
Assignee:

Essilor International Compagnie Generale d'Optique - Charenton-le-Pont
International Classification:

G02B 1/04
US Classification:

523106, 549 29, 549 30, 549 31, 549 32, 549 35, 549331, 549333, 549334
Abstract:

Spirotetrathiocarbamates (STOCs) or oxa substituted compounds (SOTOCs) of Formula I: Formula (I) or bisSTOC or bisSOTOC compounds of Formula II: Formula (II) wherein X, X, X, X, X, X, X, and X, are independently O or S; and preferably at least two and up to all four of X, X, Xand X, and at least two and up to all four of X, X, X, and Xare sulfur; Z is —CRwherein m=1 to 4; —C(R)SC(R)—, C(R)SSC(R)—, or —C(R)OC(R); n is from 0 to 4; M is selected from CHCl, CHSC(O)R, CHSC(S)R, CHS(CHCHS)qH wherein q is 0, 1 or 2; —CR═CH, —CHOC(O)CR═CH, CHN═C═S, CHN═C═O, CHNRH, CHOH, CHSCHCHCR═CH, phenyl, C(R)phenyl, furan, thiophene, halogen, C-Ccycloalkyl, C-Cheretocyclics, thiol, H, (III) or (IV) wherein A is S, O or phenyl; x is 0 or 1; Ris C-Calkyl; and Ris H or C-Calkyl have excellent optical properties. Methods for preparing these compositions and optical lenses prepared from the compounds are also provided.

Sirisoma Wanigatunga