Assignee
LUFKIN IND INC
US·13 granted patents·3 pending applications·264 citations·filing 1989–2014
Top patents by PatentIndex Score
16 records- 0195US8036829B2Apparatus for analysis and control of a reciprocating pump system by determination of a pump cardLUFKIN IND INC·Filed 2008·Granted Oct 11, 2011·53 cites·13 claims
- 0289US7212923B2Inferred production rates of a rod pumped well from surface and pump card informationLUFKIN IND INC·Filed 2005·Granted May 1, 2007·45 cites·13 claims
- 0387US9410572B2Five-axial groove cylindrical journal bearing with pressure dams for bi-directional rotationLUFKIN IND INC·Filed 2014·Granted Aug 9, 2016·11 cites·20 claims
- 0483US9115574B2Low profile rod pumping unit with pneumatic counterbalance for the active control of the rod stringLUFKIN IND INC·Filed 2012·Granted Aug 25, 2015·6 cites·20 claims
- 0578US7547196B2Method for mitigating rod float in rod pumped wellsLUFKIN IND INC·Filed 2005·Granted Jun 16, 2009·7 cites·12 claims
- 0677US6912786B2Herringbone gear teeth and method for manufacturing sameLUFKIN IND INC·Filed 2003·Granted Jul 5, 2005·22 cites·13 claims
- 0775US5052713AVehicle suspension safety systemLUFKIN IND INC·Filed 1990·Granted Oct 1, 1991·39 cites·4 claims
- 0871US7870900B2System and method for controlling a progressing cavity well pumpLUFKIN IND INC·Filed 2007·Granted Jan 18, 2011·15 cites·21 claims
- 0971US6857474B2Methods, apparatus and products useful in the operation of a sucker rod pump during the production of hydrocarbonsLUFKIN IND INC·Filed 2001·Granted Feb 22, 2005·40 cites·39 claims
- 1060US6015271AStowable walking beam pumping unitLUFKIN IND INC·Filed 1998·Granted Jan 18, 2000·21 cites·14 claims
- 1143US2014188292A1Methods, Systems, and Computer Readable Media for Sectional-Based Speed Control of a Linear PumpLUFKIN IND INC·Filed 2013·Application pending·0 cites
- 1238US6988420B2Method and apparatus for applying dynamic loads to a locked gear train for testing power transmission componentsLUFKIN IND INC·Filed 2003·Granted Jan 24, 2006·4 cites·11 claims
- 1338US2014332227A1Gas-lift valve and method of useLUFKIN IND INC·Filed 2014·Application pending·0 cites
- 1436US2005155759A1Methods, apparatus and products useful in the operation of a sucker rod pump during the production of hydrocarbonsLUFKIN IND INC·Filed 2005·Application pending·0 cites
- 1530US9617837B2Hydraulic oil well pumping apparatusLUFKIN IND INC·Filed 2014·Granted Apr 11, 2017·0 cites·3 claims
- 1616USD320770STractor with fifth wheel plate for moving trailersLUFKIN IND INC·Filed 1989·Granted Oct 15, 1991·1 cites·1 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →