Granted Patent
Utility
US 4,501,920 · App. 06/426,449
Preparation of trimethoxybenzoate salts and trimethoxybenzoic acid
Inventor:
Muthunadar P. Periasamy
Patented Case
View Patent ↗
Granted: Feb 26, 1985
Filed: Sep 29, 1982
Inventor
Muthunadar P. Periasamy
Assignee (at issue)
MALLINCKRODT LLC
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.