Inventor
GRICHAR CHARLES N
US23 patents
⚠️ This page may combine multiple inventors who share the name “GRICHAR CHARLES N”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
VARCO INT
13 patentsUS7216767B2May 15, 2007
Screen basket and shale shakers
VARCO INT65 citations98
US6565698B1May 20, 2003
Method for making vibratory separator screens
VARCO INT63 citations96
US6454099B1Sep 24, 2002
Vibrator separator screens
VARCO INT52 citations96
US6371301B1Apr 16, 2002
Screen basket for shale shakers
VARCO INT34 citations96
US6412644B1Jul 2, 2002
Vibratory separator
VARCO INT40 citations94
US6450345B1Sep 17, 2002
Glue pattern screens and methods of production
VARCO INT35 citations92
US6769550B2Aug 3, 2004
Screen assemblies for shale shakers
VARCO INT47 citations91
US6607080B2Aug 19, 2003
Screen assembly for vibratory separators
VARCO INT40 citations91
US7198156B2Apr 3, 2007
Dam basket for vibratory separators
VARCO INT29 citations89
US7520391B2Apr 21, 2009
Screen assembly for vibratory separator
VARCO INT9 citations83
US6736270B2May 18, 2004
Glued screens for shale shakers
VARCO INT16 citations83
US6669985B2Dec 30, 2003
Methods for making glued shale shaker screens
VARCO INT13 citations83
US7000776B2Feb 21, 2006
Screen assembly for vibratory separators
VARCO INT9 citations71
TUBOSCOPE I P INC
7 patentsUS6325216B1Dec 4, 2001
Screen apparatus for vibratory separator
TUBOSCOPE I P INC89 citations96
US6032806AMar 7, 2000
Screen apparatus for vibratory separator
TUBOSCOPE I P INC50 citations96
US5971159AOct 26, 1999
Screen assembly for a vibratory separator
TUBOSCOPE I P INC59 citations96
US6269953B1Aug 7, 2001
Vibratory separator screen assemblies
TUBOSCOPE I P INC67 citations95
US6371302B1Apr 16, 2002
Vibratory separator screens
TUBOSCOPE I P INC49 citations92
US6220449B1Apr 24, 2001
Flat top cloth support screen
TUBOSCOPE I P INC32 citations92
US6715611B2Apr 6, 2004
Vibratory separator
TUBOSCOPE I P INC17 citations88