Granted Patent
Utility
US 4,476,238 · App. 06/267,961
Separation of tars from carbonylation reaction mixtures
Inventors:
Burton J. Palmer, Joseph V. Posluszny
Patented Case
View Patent ↗
Granted: Oct 9, 1984
Filed: May 28, 1981
Inventors
Burton J. Palmer
Joseph V. Posluszny
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.