Inventor
CALLAHAN RICHARD A
US8 patents
⚠️ This page may combine multiple inventors who share the name “CALLAHAN RICHARD A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ENERFEX INC
6 patentsUS5233837AAug 10, 1993
Process and apparatus for producing liquid carbon dioxide
ENERFEX INC178 citations97
US5482539AJan 9, 1996
Multiple stage semi-permeable membrane process and apparatus for gas separation
ENERFEX INC51 citations94
US5873928AFeb 23, 1999
Multiple stage semi-permeable membrane process and apparatus for gas separation
ENERFEX INC22 citations91
US6128916AOct 10, 2000
Membrane technology to remove non-condensable gases from refrigeration systems
ENERFEX INC25 citations88
US5693121ADec 2, 1997
Semi-permeable membrane separation process for the production of very high purity nitrogen
ENERFEX INC13 citations69
US6953492B2Oct 11, 2005
Membrane technology to reduce nitrogen in natural gas
ENERFEX INC4 citations61