Granted Patent
Utility
US 4,806,310 · App. 07/047,338
Corrosion inhibitor
Inventors:
Michael A. Mullins, Peter A. Thomas
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: May 7, 1987
Inventors
Michael A. Mullins
Peter A. Thomas
Assignee (at issue)
Drew Chemical 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.