Granted Patent
Utility
US 6,518,322 · App. 09/623,388
Conversion of contaminated polyethylene terephthalate to decontaminated polybutylene terephthalate
Inventor:
Simon Michael West
Patented Case
View Patent ↗
Granted: Feb 11, 2003
Filed: Sep 1, 2000
Inventor
Simon Michael West
Assignee (at issue)
Petrecycle Pty Ltd
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.