Granted Patent
Utility
US 5,283,356 · App. 07/923,760
Process for manufacturing alkylene carbonates using metal phthalocyanine catalysts
Inventors:
Edward T. Marquis, John R. Sanderson
Patented Case
View Patent ↗
Granted: Feb 1, 1994
Filed: Aug 3, 1992
Inventors
Edward T. Marquis
John R. Sanderson
Assignee (at issue)
Texaco Chemical 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.