Granted Patent
Utility
US 4,337,235 · App. 06/258,498
Purification of thionyl chloride
Inventors:
Joseph S. Wisnouskas, Joseph J. Moritz
Patented Case
View Patent ↗
Granted: Jun 29, 1982
Filed: Apr 28, 1981
Inventors
Joseph S. Wisnouskas
Joseph J. Moritz
Assignee (at issue)
Hooker Chemicals & Plastics Corporation
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.