Granted Patent
Utility
US 4,410,755 · App. 06/385,238
Method to purify alpha-methyl styrene prior to catalytic hydrogenation
Inventors:
William B. Fisher, Jan F. Van Peppen
Patented Case
View Patent ↗
Granted: Oct 18, 1983
Filed: Jun 4, 1982
Inventors
William B. Fisher
Jan F. Van Peppen
Assignee (at issue)
ALLIED CONSULTING, 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.