Granted Patent
Utility
US 5,882,501 · App. 08/914,602
Method of converting amine hydrohalide into free amine
Inventors:
Peter C. Foller, David Geraint Roberts, Robert H. Tang
Patented Case
View Patent ↗
Granted: Mar 16, 1999
Filed: Aug 18, 1997
Inventors
Peter C. Foller
David Geraint Roberts
Robert H. Tang
Assignee (at issue)
PPG Industries, Inc.
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.