Granted Patent
Utility
US 4,446,056 · App. 06/101,953
Preparation of mixture of nitrogen and sulfur-nitrogen heterocyclics and use in corrosion inhibiting
Inventor:
Neil E. S. Thompson
Patented Case
View Patent ↗
Granted: May 1, 1984
Filed: Dec 10, 1979
Inventor
Neil E. S. Thompson
Assignee (at issue)
Petrolite 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.