Granted Patent
Utility
US 4,844,351 · App. 07/171,458
Method for separation, recovery, and recycling of plastics from municipal solid waste
Inventor:
Clifford C. Holloway
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Mar 21, 1988
Inventor
Clifford C. Holloway
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.