Richard C Stevenson

US Patent:

54258901, Jun 20, 1995

Filed:

Jan 11, 1994

Appl. No.:

8/180208

Inventors:

Boris V. Yudin - Moscow Region, RU
Richard Stevenson - Mesa AZ
Mikhail Boyarsky - Moscow Region, RU
Oleg N. Podcherniev - Moscow Region, RU

Assignee:

APD Cryogenics, Inc. - Allentown PA

International Classification:

C09K 504

US Classification:

252 67

Abstract:

A mixed gas refrigerant for use as a replacement for CFC refrigerants, and specifically, for R-12, which includes at least three components including R-134a, R-124, and n-butane.

US Patent:

56840560, Nov 4, 1997

Filed:

Aug 20, 1996

Appl. No.:

8/699984

Inventors:

Richard Stevenson - Mesa AZ

Assignee:

Intercool Energy Corporation - Latham NY

International Classification:

C08G 1848

US Classification:

521114

Abstract:

A blowing agent for use in preparing a polyisocyanate-based foam which comprises a major portion of HCFC-123, a minor portion of HCFC-141b, a branched or unbranched aliphatic alkane having from 6 to 10 carbon atoms or mixtures thereof, and a polyether component which reduces cell size in the resultant polyisocyanate-based foam. The polyether component includes a mixture of polymerized, oxidized perfluorinated propene polyethers having a molecular weight distribution of from about 400 to about 1800 units. Alternatively, the polyether component can be added to the foam precursor materials separate from the blowing agent. Blowing agents and polyether additives for polyurethane-based foams are also provided.

US Patent:

56021895, Feb 11, 1997

Filed:

Mar 4, 1996

Appl. No.:

8/610743

Inventors:

Richard Stevenson - Mesa AZ

Assignee:

Intercool Energy Corporation - Latham NY

International Classification:

C08G 1800

US Classification:

521131

Abstract:

A blowing agent for use in preparing a polyisocyanate-based foam which comprises a major portion of HCFC-123, a minor portion of HCFC-141b, and hexane and/or octane.

US Patent:

56226446, Apr 22, 1997

Filed:

May 24, 1995

Appl. No.:

8/449092

Inventors:

Richard Stevenson - Mesa AZ
Mikhail Boyarsky - Moscow Region, RU
Boris V. Yudin - Moscow Region, RU
Oleg N. Podcherniev - Moscow Region, RU

Assignee:

Intercool Energy - Latham NY

International Classification:

C09K 504

US Classification:

252 67

Abstract:

A mixed gas refrigerant for use as a replacement for CFC refrigerants, and specifically, for R-12, which includes at least three components including R-134a, R-124, and n-butane, with the n-butane being at least present in trace amounts and specifically between 1% and up to 4%.