Granted Patent
Utility
US 6,030,559 · App. 09/186,197
Method for the continuous manufacture of plastic foam
Inventors:
Leon F. Barry, Robert W. Simpson
Patented Case
View Patent ↗
Granted: Feb 29, 2000
Filed: Nov 4, 1998
Inventors
Leon F. Barry
Robert W. Simpson
Assignee (at issue)
Celotex Corporation
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.