Inventor · disambiguated record
John Robert Gradishar
Also filed as: GRADISHAR JOHN ROBERT
1 granted patent·2 pending applications·43 citations·filing 2006–2012
48Inventor score
Technology areasE21B
Top patents by PatentIndex Score
3 records- 0189US7730965B2Retractable joint and cementing shoe for use in completing a wellboreWEATHERFORD LAMB·Filed 2006·Granted Jun 8, 2010·43 cites·61 claims
- 0231US2013105176A1Method of controlling pressure in a wellSHELL OIL CO·Filed 2012·Application pending·0 cites
- 0329US2011259644A1Curved structural pipe shoeSHELL OIL CO·Filed 2011·Application pending·0 cites
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