Granted Patent
Utility
US 4,476,237 · App. 06/267,960
Separation of tars from carbonylation reaction mixtures
Inventor:
Richard V. Porcelli
Patented Case
View Patent ↗
Granted: Oct 9, 1984
Filed: May 28, 1981
Inventor
Richard V. Porcelli
Assignee (at issue)
The Halcon SD Group, Inc.
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.