Granted Patent
Utility
US 6,313,423 · App. 09/284,955
Application of Raman spectroscopy to identification and sorting of post-consumer plastics for recycling
Inventors:
Edward J. Sommer, Jr., John T. Rich
Patented Case
View Patent ↗
Granted: Nov 6, 2001
Filed: Jul 14, 1999
Inventors
Edward J. Sommer, Jr.
John T. Rich
Assignee (at issue)
National Recovery Technologies, LLC
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.