Inventor · disambiguated record
Charles N. Grichar
Also filed as: GRICHAR CHARLES N · GRICHAR CHARLES NEWTON
24 granted patents·11 pending applications·942 citations·filing 1982–2007
97Inventor score
Top patents by PatentIndex Score
35 records- 0199US7216767B2Screen basket and shale shakersVARCO INT·Filed 2005·Granted May 15, 2007·65 cites·16 claims
- 0296US6565698B1Method for making vibratory separator screensVARCO INT·Filed 2000·Granted May 20, 2003·63 cites·18 claims
- 0393US7198156B2Dam basket for vibratory separatorsVARCO INT·Filed 2005·Granted Apr 3, 2007·29 cites·22 claims
- 0493US6325216B1Screen apparatus for vibratory separatorTUBOSCOPE I P INC·Filed 1999·Granted Dec 4, 2001·89 cites·18 claims
- 0592US6412644B1Vibratory separatorVARCO INT·Filed 2000·Granted Jul 2, 2002·40 cites·12 claims
- 0692US6371301B1Screen basket for shale shakersVARCO INT·Filed 2000·Granted Apr 16, 2002·34 cites·11 claims
- 0792US6371302B1Vibratory separator screensTUBOSCOPE I P INC·Filed 2000·Granted Apr 16, 2002·49 cites·22 claims
- 0890US6769550B2Screen assemblies for shale shakersVARCO INT·Filed 2002·Granted Aug 3, 2004·47 cites·15 claims
- 0990US6454099B1Vibrator separator screensVARCO INT·Filed 2000·Granted Sep 24, 2002·52 cites·13 claims
- 1090US5971159AScreen assembly for a vibratory separatorTUBOSCOPE I P INC·Filed 1997·Granted Oct 26, 1999·59 cites·16 claims
- 1187US7581647B2Shale shakerVARCO INT·Filed 2003·Granted Sep 1, 2009·29 cites·25 claims
- 1287US7520391B2Screen assembly for vibratory separatorVARCO INT·Filed 2007·Granted Apr 21, 2009·9 cites·20 claims
- 1387US6607080B2Screen assembly for vibratory separatorsVARCO INT·Filed 2001·Granted Aug 19, 2003·40 cites·5 claims
- 1486US6450345B1Glue pattern screens and methods of productionVARCO INT·Filed 2000·Granted Sep 17, 2002·35 cites·19 claims
- 1586US4743226AHigh capacity continuous solid bowl centrifugeGEOSOURCE INC·Filed 1983·Granted May 10, 1988·41 cites·12 claims
- 1685US6032806AScreen apparatus for vibratory separatorTUBOSCOPE I P INC·Filed 1999·Granted Mar 7, 2000·50 cites·20 claims
- 1782US5598930AShale shaker screenADVANCED WIRECLOTH INC·Filed 1995·Granted Feb 4, 1997·53 cites·19 claims
- 1879US6736270B2Glued screens for shale shakersVARCO INT·Filed 2001·Granted May 18, 2004·16 cites·30 claims
- 1976US6715611B2Vibratory separatorTUBOSCOPE I P INC·Filed 2002·Granted Apr 6, 2004·17 cites·13 claims
- 2074US6269953B1Vibratory separator screen assembliesTUBOSCOPE I P INC·Filed 1999·Granted Aug 7, 2001·67 cites·26 claims
- 2169US6669985B2Methods for making glued shale shaker screensVARCO INT·Filed 2001·Granted Dec 30, 2003·13 cites·24 claims
- 2268US6220449B1Flat top cloth support screenTUBOSCOPE I P INC·Filed 1999·Granted Apr 24, 2001·32 cites·15 claims
- 2367US7000776B2Screen assembly for vibratory separatorsVARCO INT·Filed 2003·Granted Feb 21, 2006·9 cites·20 claims
- 2450US2005000865A1Screen assemblies and vibratory separatorsFiled 2004·Application pending·0 cites
- 2542US2004007508A1Screen assembly for vibratory separatorFiled 2003·Application pending·0 cites
- 2642US2004251175A1Apparatuses and methods for making glued screen assembliesFiled 2004·Application pending·0 cites
- 2741US2003042179A1Vibratory separator screensFiled 2002·Application pending·0 cites
- 2841US2003201237A1Shale shakersFiled 2002·Application pending·0 cites
- 2941US2005224398A1Vibratory separators and sealing screensLARGENT DAVID W·Filed 2005·Application pending·0 cites
- 3039US2005103689A1Sealing screen assemblies and vibratory separatorsFiled 2004·Application pending·0 cites
- 3139US2004112522A1Automated methods for making screen assemblies for vibratory separatorsFiled 2003·Application pending·0 cites
- 3238US2005035033A1Methods for sealing screen assemblies on vibratory separatorsFiled 2004·Application pending·0 cites
- 3338US2005067327A1Screen assemblies for shale shakersFiled 2004·Application pending·0 cites
- 3436US2002104611A1Self-flattening screens for vibratory separatorsFiled 2002·Application pending·0 cites
- 3532US4505591ASolids mixing well structure and methodGEOSOURCE INC·Filed 1982·Granted Mar 19, 1985·4 cites·4 claims
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