Granted Patent
Utility
US 5,419,438 · App. 08/157,839
Apparatus and method for sorting post-consumer articles according to PVC content
Inventors:
H. Parks Squyres, William S. Drummond
Patented Case
View Patent ↗
Granted: May 30, 1995
Filed: Nov 24, 1993
Inventors
H. Parks Squyres
William S. Drummond
Assignee (at issue)
Simco/Ramic 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.