Granted Patent
Utility
US 5,234,544 · App. 07/792,512
Cleaning and bleaching of secondary fiber
Inventor:
Ronald C. Naddeo
Patented Case
View Patent ↗
Granted: Aug 10, 1993
Filed: Nov 13, 1991
Inventor
Ronald C. Naddeo
Assignee (at issue)
Air Products and Chemicals, 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.