Assignee
SUNSTONE CORP
US·11 granted patents·445 citations·filing 2001–2010
Top patents by PatentIndex Score
11 records- 0195US6666274B2Tubing containing electrical wiring insertSUNSTONE CORP·Filed 2002·Granted Dec 23, 2003·155 cites·49 claims
- 0293US7468173B2Method for producing nitrogen to use in under balanced drilling, secondary recovery production operations and pipeline maintenanceSUNSTONE CORP·Filed 2004·Granted Dec 23, 2008·68 cites·23 claims
- 0392US8028750B2Force balanced rotating pressure control deviceSUNSTONE CORP·Filed 2010·Granted Oct 4, 2011·21 cites·7 claims
- 0489US7537062B2Flapper valve and actuatorSUNSTONE CORP·Filed 2006·Granted May 26, 2009·35 cites·18 claims
- 0582US7137945B2Underground treatment of biowasteSUNSTONE CORP·Filed 2005·Granted Nov 21, 2006·7 cites·7 claims
- 0679US7380590B2Rotating pressure control headSUNSTONE CORP·Filed 2004·Granted Jun 3, 2008·56 cites·38 claims
- 0773US7981379B2Producing nitrogen to use in under balanced drilling, secondary recovery production operations and pipeline maintenanceSUNSTONE CORP·Filed 2008·Granted Jul 19, 2011·2 cites·58 claims
- 0871US7226090B2Rod and tubing joint of multiple orientations containing electrical wiringSUNSTONE CORP·Filed 2003·Granted Jun 5, 2007·38 cites·2 claims
- 0961US6769498B2Method and apparatus for inducing under balanced drilling conditions using an injection tool attached to a concentric string of casingSUNSTONE CORP·Filed 2002·Granted Aug 3, 2004·29 cites·4 claims
- 1055US6877571B2Down hole drilling assembly with independent jet pumpSUNSTONE CORP·Filed 2001·Granted Apr 12, 2005·18 cites·49 claims
- 1153US6899188B2Down hole drilling assembly with concentric casing actuated jet pumpSUNSTONE CORP·Filed 2003·Granted May 31, 2005·16 cites·50 claims
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