Inventor

GRAGG FREDERICK M

US2 patents

⚠️ This page may combine multiple inventors who share the name “GRAGG FREDERICK M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

EXXON RESEARCH ENGINEERING CO

1 patent

US4459201AJul 10, 1984

Oil shale retorting process utilizing indirect heat transfer

EXXON RESEARCH ENGINEERING CO30 citations88

OCCIDENTAL RES CORP

1 patent

US4448249AMay 15, 1984

Method of in situ oil shale retort ignition with oxygen control

OCCIDENTAL RES CORP1 citations42