Granted Patent
Utility
US 4,806,294 · App. 07/207,125
Method of making a foam injection molded article
Inventors:
Robert M. Lapierre, Nicholas J. Leonardi
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Jun 15, 1988
Inventors
Robert M. Lapierre
Nicholas J. Leonardi
Assignee (at issue)
Enron Chemical Company
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.