Granted Patent
Utility
US 5,523,352 · App. 08/307,995
Polyacetal compositions and method of improving wear resistance and reducing friction thereof
Inventor:
Robertus F. A. M. Janssen
Patented Case
View Patent ↗
Granted: Jun 4, 1996
Filed: Sep 16, 1994
Inventor
Robertus F. A. M. Janssen
Assignee (at issue)
Kawasaki Chemical Holding Co., 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.