Inventor

DEGRAFFENRIED JAMES P

US3 patents

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

PHILLIPS PETROLEUM CO

2 patents

US5656150AAug 12, 1997

Method for treating the radiant tubes of a fired heater in a thermal cracking process

PHILLIPS PETROLEUM CO30 citations91

US6464858B1Oct 15, 2002

Method for improving the yield of heavy hydrocarbons in a thermal cracking process

PHILLIPS PETROLEUM CO14 citations82

(unassigned)

1 patent

US6056870AMay 2, 2000

Method of promoting the decomposition of silicon compounds in a process for depositing silicon upon a metal surface

2 citations60