Granted Patent
Utility
US 6,090,337 · App. 08/903,447
Method for making multi-layer plastic preform for blow molding
Inventor:
William A. Slat
Patented Case
View Patent ↗
Granted: Jul 18, 2000
Filed: Jul 30, 1997
Inventor
William A. Slat
Assignee (at issue)
Plastipak Packaging, 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.