Inventor · disambiguated record
Frederick M. Gragg
Also filed as: GRAGG FREDERICK M · GRAGG FREDERICK MICHAEL
3 granted patents·46 citations·filing 1982–1999
69Inventor score
Top patents by PatentIndex Score
3 records- 0180US4459201AOil shale retorting process utilizing indirect heat transferEXXON RESEARCH ENGINEERING CO·Filed 1982·Granted Jul 10, 1984·30 cites·13 claims
- 0255US6214776B1High stress electrical oilEXXON RESEARCH ENGINEERING CO·Filed 1999·Granted Apr 10, 2001·15 cites·7 claims
- 0324US4448249AMethod of in situ oil shale retort ignition with oxygen controlOCCIDENTAL RES CORP·Filed 1982·Granted May 15, 1984·1 cites·31 claims
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