Inventor · disambiguated record
Robert Jancha
Also filed as: JANCHA ROBERT · JANCHA ROBERT A · JANCHA ROBERT ALLEN
6 granted patents·2 pending applications·118 citations·filing 2001–2012
85Inventor score
Technology areasE21B
Files withWEATHERFORD LAMB3BJ SERVICES COMPANY LLC2BJ SERVICES CO1HENSCHEL ROBERT C1JANCHA ROBERT A1
Top patents by PatentIndex Score
8 records- 0185US9133688B2Integral multiple stage safety valvesJANCHA ROBERT A·Filed 2012·Granted Sep 15, 2015·14 cites·13 claims
- 0277US6666271B2Curved flapper and seat for a subsurface saftey valveWEATHERFORD LAMB·Filed 2001·Granted Dec 23, 2003·44 cites·54 claims
- 0372US7798235B2Safety valve torsional spring assembly and methodBJ SERVICES COMPANY LLC·Filed 2008·Granted Sep 21, 2010·14 cites·15 claims
- 0470US8701781B2Subsurface safety valve flapperHENSCHEL ROBERT C·Filed 2011·Granted Apr 22, 2014·4 cites·15 claims
- 0566US6851477B2Curved flapper with angle variant seat for a subsurface safety valveWEATHERFORD LAMB·Filed 2002·Granted Feb 8, 2005·26 cites·30 claims
- 0653US6854519B2Subsurface valve with system and method for sealingWEATHERFORD LAMB·Filed 2002·Granted Feb 15, 2005·16 cites·75 claims
- 0745US2011114335A1Subsurface Safety Valve FlapperBJ SERVICES COMPANY LLC·Filed 2011·Application pending·0 cites
- 0843US2010175887A1Subsurface Safety Valve FlapperBJ SERVICES CO·Filed 2009·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Robert Jancha files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →