Granted Patent
Utility
US 4,358,623 · App. 06/286,235
Process for catalytically converting methanol to formaldehyde
Inventors:
Carl D. Murphy, William P. McMillan
Patented Case
View Patent ↗
Granted: Nov 9, 1982
Filed: Jul 23, 1981
Inventors
Carl D. Murphy
William P. McMillan
Assignee (at issue)
Celanese GmbH
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.