Granted Patent
Utility
US 4,732,740 · App. 06/658,474
Integrated heavy oil pyrolysis process
Inventors:
Herman H. Woebcke, Swami Narayanan, Axel Johnson
Patented Case
View Patent ↗
Granted: Mar 22, 1988
Filed: Oct 9, 1984
Inventors
Herman H. Woebcke
Swami Narayanan
Axel Johnson
Assignee (at issue)
Stone & Webster Engineering Corp.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.