Granted Patent
Utility
US 5,688,570 · App. 08/543,130
Method and apparatus for forming a multi-layer preform
Inventor:
Frank A. Ruttinger, Sr.
Patented Case
View Patent ↗
Granted: Nov 18, 1997
Filed: Oct 13, 1995
Inventor
Frank A. Ruttinger, Sr.
Assignee (at issue)
Crown, Cork & Seal Company, 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.