Granted Patent
Utility
US 4,374,741 · App. 06/285,575
Polyamide and functional fluid containing same
Inventor:
Walter Rieder
Patented Case
View Patent ↗
Granted: Feb 22, 1983
Filed: Jul 21, 1981
Inventor
Walter Rieder
Assignee (at issue)
Cincinnatti Milacron 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.