Granted Patent
Utility
US 4,453,017 · App. 06/364,326
Process for the methylation of phenolic compounds with trimethyl phosphate
Inventor:
Randall B. Nelson
Patented Case
View Patent ↗
Granted: Jun 5, 1984
Filed: Apr 1, 1982
Inventor
Randall B. Nelson
Assignee (at issue)
International Telephone and Telegraph 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.