Granted Patent
Utility
US 4,515,708 · App. 06/552,402
Corrosion inhibitors
Inventors:
John A. Haslegrave, Daniel S. Sullivan, III
Patented Case
View Patent ↗
Granted: May 7, 1985
Filed: Nov 16, 1983
Inventors
John A. Haslegrave
Daniel S. Sullivan, III
Assignee (at issue)
Exxon Research and Engineering Company
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.