Granted Patent
Utility
US 5,137,675 · App. 07/699,103
Apparatus and method for coextruding materials having different temperature dependent properties
Inventor:
Richard Rabe
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: May 13, 1991
Inventor
Richard Rabe
Assignee (at issue)
GenCorp, 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.