Granted Patent
Utility
US 4,433,181 · App. 06/343,537
Process for recovering a crystallization medium
Inventor:
Samuel N. Holter
Patented Case
View Patent ↗
Granted: Feb 21, 1984
Filed: Jan 28, 1982
Inventor
Samuel N. Holter
Assignee (at issue)
KOPPERS, 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.