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Duffer Crawford
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Houston, TX, US
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Patents Grants
last 30 patents
Information
Patent Grant
Method for nitrogen rejection and or helium recovery in an LNG liqu...
Patent number
8,522,574
Issue date
Sep 3, 2013
Kellogg Brown & Root LLC
Duffer Crawford
F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information
Patent Grant
Method for partial condensation of hydrocarbon gas mixtures
Patent number
4,726,826
Issue date
Feb 23, 1988
The M. W. Kellogg Company
Duffer B. Crawford
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Removal of mercury from gases
Patent number
4,693,731
Issue date
Sep 15, 1987
The M. W. Kellogg Company
Ramanathan R. Tarakad
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Parallel steam reformers to provide low energy process
Patent number
4,162,290
Issue date
Jul 24, 1979
Pullman Incorporated
Duffer B. Crawford
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Parallel steam reformers to provide low energy process
Patent number
4,079,017
Issue date
Mar 14, 1978
Pullman Incorporated
Duffer Brooks Crawford
C01 - INORGANIC CHEMISTRY
Patents Applications
last 30 patents
Information
Patent Application
Method for Nitrogen Rejection and or Helium Recovery in an Liquefac...
Publication number
20100162755
Publication date
Jul 1, 2010
Kellogg Brown & Root LLC
Duffer Crawford
F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...