Herbert C Strong

US Patent:

40340660, Jul 5, 1977

Filed:

Nov 2, 1973

Appl. No.:

5/412425

Inventors:

Herbert M. Strong - Schenectady NY
Roy E. Tuft - Guilderland Center NY

Assignee:

General Electric Company - Columbus OH

International Classification:

C01B 3106

US Classification:

423446

Abstract:

Improvements are provided in reaction vessel construction used in the growth of diamond by the process disclosed in U. S. Pat. No. 3,297,407 -- Wentorf, Jr. In assembly of the reaction vessel of this invention, the plug of catalyst-solvent material is disposed between the source of carbon and the diamond seed material as in the Wentorf, Jr. patent and, in addition, the diamond seed material is separated from the catalyst-solvent plug by means for isolating the diamond seed material from the catalyst-solvent material until after the latter has become saturated with carbon from the source of carbon. In addition, preferably the under surface of the plug of catalyst-solvent metal is covered with means for suppressing diamond nucleation. The nucleation suppressing means is usually in the form of a disc and may completely cover the underside of the catalyst-solvent plug or may have a hole therethrough in juxtaposition to the diamond seed/isolating means combination(s). When both the isolating means and the nucleation suppressing means are employed, capability is provided for simultaneously preventing dissolution of the diamond seed and suppressing spurious diamond nucleation.

US Patent:

40426734, Aug 16, 1977

Filed:

Nov 2, 1973

Appl. No.:

5/412332

Inventors:

Herbert M. Strong - Schenectady NY

Assignee:

General Electric Company - Columbus OH

International Classification:

C01B 3106

US Classification:

423446

Abstract:

Diamond crystals of controlled impurity content and/or impurity distribution and reaction vessel configurations for the production thereof are described. Combinations of "dopant," "getter" and "compensator" materials are employed to produce gem stones of unusual color patterns, or zoned coloration, using specific reaction vessel configurations.

US Patent:

41743806, Nov 13, 1979

Filed:

Dec 14, 1977

Appl. No.:

5/860283

Inventors:

Herbert M. Strong - Schenectady NY
Richard M. Chrenko - Scotia NY
Roy E. Tuft - Guilderland Center NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

C01B 3106

US Classification:

423446

Abstract:

Type Ib synthetic diamond crystal is annealed at an annealing temperature ranging from about 1500. degree. C. to about 2200. degree. C. under a pressure which prevents significant graphitization of the diamond during the annealing to convert at least about 20% of the total amount of type Ib nitrogen present in the crystal to type Ia nitrogen.

US Patent:

40733807, Feb 14, 1978

Filed:

Jul 15, 1976

Appl. No.:

5/705720

Inventors:

Herbert M. Strong - Schenectady NY
Roy E. Tuft - Guilderland Center NY

Assignee:

General Electric Company - Worthington OH

International Classification:

C01B 3106
B65D 2508
B65D 8570

US Classification:

206219

Abstract:

Improvements are provided in reaction vessel construction used in the growth of diamond by the process disclosed in U. S. Pat. No. 3,297,407 -- Wentorf, Jr. In assembly of the reaction vessel of this invention, the plug of catalyst-solvent material is disposed between the source of carbon and the diamond seed material as in the Wentorf, Jr. patent and, in addition, the diamond seed material is separated from the catalyst-solvent plug by means for isolating the diamond seed material from the catalyst-solvent material until after the latter has become saturated with carbon from the source of carbon. In addition, preferably the under surface of the plug of catalyst-solvent metal is covered with means for suppressing diamond nucleation. The nucleation suppressing means is usually in the form of a disc and may completely cover the underside of the catalyst-solvent plug or may have a hole therethrough in juxtaposition to the diamond seed/isolating means combination(s). When both the isolating means and the nucleation suppressing means are employed, capability is provided for simultaneously preventing dissolution of the diamond seed and suppressing spurious diamond nucleation.

US Patent:

40821854, Apr 4, 1978

Filed:

Jul 15, 1976

Appl. No.:

5/705547

Inventors:

Herbert M. Strong - Schenectady NY

Assignee:

General Electric Company - Worthington OH

International Classification:

C01B 3106
B65D 8500

US Classification:

206525

Abstract:

Diamond crystals of controlled impurity content and/or impurity distribution and reaction vessel configurations for the production thereof are described. Combinations of "dopant", "getter" and "compensator" materials are employed to produce gem stones of unusual color patterns, or zoned coloration, using specific reaction vessel configurations.

US Patent:

41246900, Nov 7, 1978

Filed:

Dec 2, 1977

Appl. No.:

5/856905

Inventors:

Herbert M. Strong - Schenectady NY
Richard M. Chrenko - Scotia NY
Roy E. Tuft - Guilderland Center NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

C01B 3106

US Classification:

423446

Abstract:

Type Ib or mixed type Ib-Ia natural diamond crystal is annealed at an annealing temperature ranging from about 1500. degree. C to about 2200. degree. C under a pressure which prevents significant graphitization of the diamond during the annealing to convert at least 20% of the total amount of type Ib nitrogen present in the crystal to type Ia nitrogen.

US Patent:

43011349, Nov 17, 1981

Filed:

Mar 10, 1978

Appl. No.:

5/885193

Inventors:

Herbert M. Strong - Schenectady NY

Assignee:

General Electric Company - Columbus OH

International Classification:

C01B 3106

US Classification:

423446

Abstract:

Diamond crystals of controlled impurity content and/or impurity distribution and reaction vessel configurations for the production thereof are described. Combinations of "dopant", "getter" and "compensator" materials are employed to produce gem stones of unusual color patterns, or zoned coloration, using specific reaction vessel configurations.

US Patent:

43405762, Jul 20, 1982

Filed:

May 9, 1980

Appl. No.:

6/148214

Inventors:

Herbert M. Strong - Schenectady NY

Assignee:

General Electric Company - Worthington OH

International Classification:

C01B 3106

US Classification:

423446

Abstract:

Means are described for suppressing spontaneous diamond nucleation in the vicinity of diamond seed material located in reaction vessel construction used in the growth of diamond by the process disclosed in U. S. Pat. No. 3,297,407--Wentorf, Jr. In assembly of the reaction vessel a portion of the lower surface of the plug of catalyst-solvent metal is disposed in contact with the diamond seed material. Preferably all of the balance of the lower surface area of the catalyst-solvent plug adjacent the seed material is covered with a disc or layer of a material different from the catalyst-solvent metal employed and selected from a list of specific materials that suppress diamond nucleation.