Granted Patent
Utility
US 4,492,624 · App. 06/431,588
Duocracking process for the production of olefins from both heavy and light hydrocarbons
Inventors:
Axel Johnson, Swami Narayanan, Herman N. Woebcke
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Sep 30, 1982
Inventors
Axel Johnson
Swami Narayanan
Herman N. Woebcke
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.