Henry Rawls

US Patent:

6410765, Jun 25, 2002

Filed:

Oct 17, 2000

Appl. No.:

09/690527

Inventors:

Stephen T. Wellinghoff - San Antonio TX
Hong Dixon - Helotes TX
Henry R. Rawls - San Antonio TX
Barry K. Norling - San Antonio TX

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

C07F 908

US Classification:

556 10, 25229901, 25229964, 552309, 556 12, 560 61, 560 67, 560 70, 525360, 525361, 525389, 523212, 523213

Abstract:

There are disclosed amphoteric nano-sized metal oxide particles functionalized with silyl esters of a phosphonate and composites thereof with an acrylate-based monomer, including liquid crystal monomers photopolymerizable at ambient temperature. Also disclosed are the method making such functionalized particular by reacting a metal oxide with a silyl ester of a phosphonate in the presence of a non-aqueous solvent and in an inert atmosphere and the method of making the composites wherein the functionalized particles are admixed with an acrylate-based matrix monomer, including liquid crystal monomers photopolymerizable at ambient temperature. Further disclosed is the method of dental repair wherein the composites are applied to a tooth and photopolymerized.

US Patent:

6417244, Jul 9, 2002

Filed:

Oct 13, 2000

Appl. No.:

09/687447

Inventors:

Stephen T. Wellinghoff - San Antonio TX
Hong Dixon - Helotes TX
Henry R. Rawls - San Antonio TX
Barry K. Norling - San Antonio TX

Assignee:

Southwest Research Institute - San Antonio TX
Board of Regents, The University of Texas System - Austin TX

International Classification:

C08J 328

US Classification:

522104, 526116, 526258, 526260, 526262, 526263

Abstract:

Metal oxide and metal oxide-silica nanoparticles are disclosed wherein the surfaces thereof are complexed with a polymerizable, biocompatible, heterocyclic base. Polymerizable compositions are prepared by loading such nanoparticles into acrylate based monomer matrices, which compositions can then be photocured into X-ray opaque, transparent or translucent solids. Methods are disclosed for forming such complexed nanoparticles and compositions and for using such compositions as medical or dental restoratives.

US Patent:

6695617, Feb 24, 2004

Filed:

Oct 18, 2000

Appl. No.:

09/691680

Inventors:

Stephen T. Wellinghoff - San Antonio TX
Hong Dixon - Helotes TX
Henry R. Rawls - San Antonio TX
Barry K. Norling - San Antonio TX

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

A61C 1308

US Classification:

4332021, 433226, 552309, 260 61, 260 67, 260 70, 556 10, 556 12, 525389, 525360, 525361, 25229901, 25229964

Abstract:

There are disclosed amphoteric nano-sized metal oxide particles functionalized with silyl esters of a phosphonate and composites thereof with an acrylate-based monomer, including liquid crystal monomers photopolymerizable at ambient temperature. Also disclosed are the method making such functionalized particular by reacting a metal oxide with a silyl ester of a phosphonate in the presence of a non-aqueous solvent and in an inert atmosphere and the method of making the composites wherein the functionalized particles are admixed with an acrylate-based matrix monomer, including liquid crystal monomers photopolymerizable at ambient temperature. Further disclosed is the method of dental repair wherein the composites are applied to a tooth and photopolymerized.

US Patent:

6696585, Feb 24, 2004

Filed:

Sep 22, 2000

Appl. No.:

09/667370

Inventors:

Stephen T. Wellinghoff - San Antonio TX
Hong Dixon - Helotes TX
Henry R. Rawls - San Antonio TX
Barry K. Norling - San Antonio TX

Assignee:

Southwest Research Institute - San Antonio TX
Board of Regents, The University of Texas System - Austin TX

International Classification:

C07F 908

US Classification:

556 10, 25229964, 25229901, 552309, 556 12, 560 61, 560 67, 560 70, 525360, 525361, 525389, 523212, 523213

Abstract:

There are disclosed amphoteric nano-sized metal oxide particles functionalized with silyl esters of a phosphonate and composites thereof with an acrylate-based monomer, including liquid crystal monomers photopolymerizable at ambient temperature. Also disclosed are the method making such functionalized particular by reacting a metal oxide with a silyl ester of a phosphonate in the presence of a non-aqueous solvent and in an inert atmosphere and the method of making the composites wherein the functionalized particles are admixed with an acrylate-based matrix monomer, including liquid crystal monomers photopolymerizable at ambient temperature. Further disclosed is the method of dental repair wherein the composites are applied to a tooth and photopolymerized.

US Patent:

6743936, Jun 1, 2004

Filed:

Oct 19, 2000

Appl. No.:

09/692690

Inventors:

Stephen T. Wellinghoff - San Antonio TX
Hong Dixon - Helotes TX
Henry R. Rawls - San Antonio TX
Barry K. Norling - San Antonio TX

Assignee:

Southwest Research Insittute - San Antonio TX
Board of Regents, The University of Texas System - Austin TX

International Classification:

C07F 902

US Classification:

556405, 2523152, 423 65, 423338, 501 12, 501134, 558 73, 568 11

Abstract:

There are disclosed amphoteric nano-sized metal oxide particles functionalized with silyl esters of a phosphonate and composites thereof with an acrylate-based monomer, including liquid crystal monomers photopolymerizable at ambient temperature. Also disclosed are the method making such functionalized particular by reacting a metal oxide with a silyl ester of a phosphonate in the presence of a non-aqueous solvent and in an inert atmosphere and the method of making the composites wherein the functionalized particles are admixed with an acrylate-based matrix monomer, including liquid crystal monomers photopolymerizable at ambient temperature. Further disclosed is the method of dental repair wherein the composites are applied to a tooth and photopolymerized.

US Patent:

7037583, May 2, 2006

Filed:

Nov 29, 2000

Appl. No.:

09/726769

Inventors:

Benjamin R. Furman - San Antonio TX, US
Stephen T. Wellinghoff - San Antonio TX, US
Henry R. Rawls - San Antonio TX, US
Hong Dixon - Helotes TX, US
Barry K. Norling - San Antonio TX, US

Assignee:

Southwest Research Institute - San Antonio TX
Board of Regents, The University of Texas Systems - Austin TX

International Classification:

B32B 5/16

US Classification:

428403, 428407

Abstract:

Metal oxide nanoparticles having at least some surface acid sites functionalized with an adhesion promoter and at least some surface acid sites functionalized with a coupling agent. The nanoparticles are useful in forming composites comprising photopolymerizable matrix monomers, and are primarily suitable for dental and medical restoration. In a preferred embodiment, the metal oxide comprises zirconium, and the coupling agent is a zirconate.

US Patent:

62589741, Jul 10, 2001

Filed:

Jun 23, 1998

Appl. No.:

9/103197

Inventors:

Stephen T. Wellinghoff - San Antonio TX
Hong Dixon - San Antonio TX
Henry R. Rawls - San Antonio TX
Barry K. Norling - San Antonio TX

Assignee:

Southwest Research Institute - San Antonio TX

International Classification:

C07C 6990
C07K 1920

US Classification:

560 70

Abstract:

There are disclosed amphoteric nano-sized metal oxide particles functionalized with silyl esters of a phosphonate and composites thereof with an acrylate-based monomer, including liquid crystal monomers photopolymerizable at ambient temperature. Also disclosed are the method making such functionalized particular by reacting a metal oxide with a silyl ester of a phosphonate in the presence of a non-aqueous solvent and in an inert atmosphere and the method of making the composites wherein the functionalized particles are admixed with an acrylate-based matrix monomer, including liquid crystal monomers photopolymerizable at ambient temperature. Further disclosed is the method of dental repair wherein the composites are applied to a tooth and photopolymerized.

US Patent:

61944815, Feb 27, 2001

Filed:

May 19, 1999

Appl. No.:

9/314350

Inventors:

Benjamin R. Furman - San Antonio TX
Stephen T. Wellinghoff - San Antonio TX
Henry R. Rawls - San Antonio TX
Hong Dixon - San Antonio TX
Barry K. Norling - San Antonio TX

Assignee:

Board of Regents of the University of Texas System - Austin TX
Southwest Research Institute - San Antonio TX

International Classification:

C08K 322
C08K 906
C08F 250

US Classification:

522 77

Abstract:

Zirconium oxide nanoparticles having at least some surface acid sites functionalized with a silanating agent and at least some surface acid sites finctionalized with zirconate or a zircoaluminate. The nanoparticles are useful in composites comprising photopolymerizable alkene matrix monomers, and are primarily suitable for dental and medical restoration.