Assignee
HARBISON FISCHER INC
US·13 granted patents·1 pending application·241 citations·filing 2000–2021
Top patents by PatentIndex Score
14 records- 0193US7909589B2Downhole pumps with sand snareHARBISON FISCHER INC·Filed 2010·Granted Mar 22, 2011·15 cites·4 claims
- 0291US7686598B2Downhole pumps with sand snareHARBISON FISCHER INC·Filed 2006·Granted Mar 30, 2010·16 cites·15 claims
- 0387US11300121B2Downhole pump sand filtering snaresHARBISON FISCHER INC·Filed 2020·Granted Apr 12, 2022·7 cites·19 claims
- 0486US6770121B1Separator with regions of differing surface tensionsHARBISON FISCHER INC·Filed 2002·Granted Aug 3, 2004·50 cites·19 claims
- 0583US6945762B2Mechanically actuated gas separator for downhole pumpHARBISON FISCHER INC·Filed 2003·Granted Sep 20, 2005·61 cites·16 claims
- 0680US11834916B2Shear coupling for sucker rod stringHARBISON FISCHER INC·Filed 2021·Granted Dec 5, 2023·2 cites·21 claims
- 0779US7270690B1Separator with vane assembly and filter arrangementHARBISON FISCHER INC·Filed 2004·Granted Sep 18, 2007·29 cites·4 claims
- 0877US6585416B1Self-aligning shaft supportHARBISON FISCHER INC·Filed 2000·Granted Jul 1, 2003·19 cites·15 claims
- 0973US7607901B2Wear rings for downhole pumpHARBISON FISCHER INC·Filed 2005·Granted Oct 27, 2009·7 cites·13 claims
- 1069US7458787B2Apparatus and method for reducing gas lock in downhole pumpsHARBISON FISCHER INC·Filed 2005·Granted Dec 2, 2008·19 cites·12 claims
- 1163US7604464B2Mechanically actuated gas separator for downhole pumpHARBISON FISCHER INC·Filed 2005·Granted Oct 20, 2009·7 cites·6 claims
- 1263US6966248B2Adjustable valve rod and pull tube guide for downhole pumpsHARBISON FISCHER INC·Filed 2003·Granted Nov 22, 2005·9 cites·9 claims
- 1357US9011110B2Relocatable sucker rod pump assemblyHARBISON FISCHER INC·Filed 2012·Granted Apr 21, 2015·0 cites·8 claims
- 1442US2019309612A1Downhole pumps with outside pressure balancing and sand separation and isolationHARBISON FISCHER INC·Filed 2019·Application pending·0 cites
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