Larry L Hench

US Patent:

52220923, Jun 22, 1993

Filed:

Jul 11, 1990

Appl. No.:

7/550871

Inventors:

Larry L. Hench - Gainesville FL
Joseph H. Simmons - Gainesville FL
Romulo Ochoa - Gainesville FL

Assignee:

University of Florida - Gainesville FL

International Classification:

H01S 314

US Classification:

372 53

Abstract:

The present invention relates to a dye laser comprising a highly porous, consolidated silica sol-gel monolith having incorporated therein at least one laser dye, wherein said dye laser is substantially solvent free. The dye laser is prepared by immersing a highly porous, consolidated silica sol-gel monolith in a solution of at least one laser dye and at least one solvent until the solution enters the pores of the monolith to a significant degree to form an impregnated silica sol-gel monolith, and then drying the impregnated silica sol-gel monolith to vaporize substantially all the solvent present within the pores of the monolith.

US Patent:

41893255, Feb 19, 1980

Filed:

Jan 9, 1979

Appl. No.:

6/002019

Inventors:

Joy M. Barrett - Gainesville FL
David E. Clark - Gainesville FL
Larry L. Hench - Gainesville FL

Assignee:

The Board of Regents, State of Florida, University of Florida - Tallahassee FL

International Classification:

C03C 304
C03C 322
C09K 300

US Classification:

106 35

Abstract:

A glass-ceramic containing Li. sub. 2 O, CaO, Al. sub. 2 O. sub. 3, SiO. sub. 2, platinum and Nb. sub. 2 O. sub. 5 is disclosed. It is highly suitable for use in dental restorations because of its combination of castability, chemical durability and mechanical strength. The aesthetic qualities of natural teeth may be reproduced by proper control of processing parameters, e. g. addition of coloring additives and devitrification heat treatment schedule. Dental restorations may be made by casting a melt in a conventional dental laboratory investment mold, followed by devitrification. Fracture of cast margins is avoided because of the mechanical strength and toughness of the glass-ceramic. Partial restorations can be bonded with dental cement directly to the tooth of a recipient without the need for building the restoration upon an undercoat of metal alloy.

US Patent:

50809628, Jan 14, 1992

Filed:

Apr 5, 1989

Appl. No.:

7/333742

Inventors:

Larry L. Hench - Gainesville FL

Assignee:

University of Florida - Gainesville FL

International Classification:

B32B 702
B32B 904
C23F 100
H01L 21306

US Classification:

428218

Abstract:

An optical device made by treating, such as by a laser beam, a preselected portion of a silica gel monolithic body to obtain a density for the treated portion different from the density of the body.

US Patent:

41342186, Jan 16, 1979

Filed:

Oct 11, 1977

Appl. No.:

5/841076

Inventors:

Calvin K. Adams - Gainesville FL
Mark K. Goldstein - Gainesville FL
Deborah C. Hall - Gainesville FL
Larry L. Hench - Gainesville FL
Michael C. Madden - Gainesville FL
Henry S. Pennypacker - Gainesville FL
Gerald H. Stein - Gainesville FL

International Classification:

G09B 2328

US Classification:

35 17

Abstract:

A method, apparatus and a lifelike model of a human female breast form a breast cancer detection training system. The model closely simulates the feeding of the different tissues of the human breast and except for a tumor-free comparison model, contains at least one simulated tumor. When used in conjunction with the electronic training apparatus, the model also contains a pressure sensing means. The apparatus and method compare signals initiated by the trainee with stored signals representative of the number of simulated tumors in the model, their location, and the pressure required to feel them and provide feedback information to the trainee so as to improve the trainee's examination technique.

US Patent:

41593588, Jun 26, 1979

Filed:

May 19, 1977

Appl. No.:

5/798671

Inventors:

Larry L. Hench - Gainesville FL
Paul J. Buscemi - Gainesville FL

Assignee:

Board of Regents, State of Florida - Tallahassee FL

International Classification:

B05D 302

US Classification:

427318

Abstract:

A method of bonding a bioglass layer to a metal substrate comprising heating the metal substrate having a roughened, oxidized surface to about a temperature at which the expansion of the metal is substantially equal to that of the bioglass at the temperature above which the thermal expansion of the bioglass is non-linear, immersing the heated metal surface in molten bioglass, the time of immersion being of such duration that the temperature of the metal does not rise substantially above the temperature to which it is heated, allowing the coated substrate to cool whereby the bioglass layer is bonded to the metal substrate by ion diffusion and thermo-mechanical stresses in the bioglass and metal layer are relieved at a substantially equal rate and the product produced by said process.

US Patent:

53566670, Oct 18, 1994

Filed:

May 19, 1993

Appl. No.:

8/063558

Inventors:

Larry L. Hench - Gainesville FL
Joseph H. Simmons - Gainesville FL
Romulo Ochoa - Gainesville FL

Assignee:

The University of Florida - Gainesville FL

International Classification:

C09K 1100

US Classification:

427384

Abstract:

The present invention relates to a dye laser including a highly porous, consolidated silica sol-gel monolith having incorporated therein at least one laser dye, wherein the dye laser is substantially solvent free. The dye laser is prepared by immersing a highly porous, consolidated silica sol-gel monolith in a solution of at least one laser dye and at least one solvent until the solution enters the pores of the monolith to a significant degree to form an impregnated silica sol-gel monolith, and then drying the impregnated silica sol-gel monolith to vaporize substantially all the solvent present within the pores of the monolith.

US Patent:

48511501, Jul 25, 1989

Filed:

Feb 27, 1984

Appl. No.:

6/583741

Inventors:

Larry L. Hench - Gainesville FL
Gerard F. Orcel - Gainesville FL

Assignee:

University of Florida - Gainesville FL

International Classification:

B01J 1300
B29C 3902

US Classification:

2523156

Abstract:

Large sol-gel derived silicon-containing monoliths are prepared with the use of drying control chemical additives selected from the group consisting of glycerol, formamide, oxalic acid and acids of the formula C. sub. n H. sub. 2(n-1) O. sub. 2 N to control the ultrastructure of the gel solid and pore phases. Gelation, aging, drying, and densification of the sol-gel derived monoliths may be performed rapidly in tens of hours instead of tens of days without cracking, final densification at temperature of 800. degree. C. to 1200. degree. C. or less being possible. The silicon-containing monolith comprises a ternary SiO. sub. 2 --B. sub. 2 O. sub. 3 --Na. sub. 2 O system.

US Patent:

51963825, Mar 23, 1993

Filed:

Aug 16, 1990

Appl. No.:

7/568619

Inventors:

Larry L. Hench - Gainesville FL

Assignee:

University of Florida Research Foundation, Inc. - Gainesville FL

International Classification:

B01J 1300
C03C 300
C03C 3078

US Classification:

501 12

Abstract:

A process for producing sol-gel monoliths containing SiO. sub. 2 by mixing water, a SiO. sub. 2 precursor and ketomalonic acid to form a sol, gelling the sol, aging the gelled sol and drying the aged gelled sol. Optional additional ingredients that may be added in the mixing step include salts of non-precipitating transition metals such as copper and/or additional precursors such as precursors for B. sub. 2 O. sub. 3, Na. sub. 2 O, Li. sub. 2 O, TiO. sub. 2, Al. sub. 2 O. sub. 3 or mixtures thereof.