Granted Patent
Utility
US 4,970,045 · App. 06/441,820
Rotational molding of articles having impact resistance
Inventors:
Albert H. Steinberg, Paul W. Flood
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: Nov 15, 1982
Inventors
Albert H. Steinberg
Paul W. Flood
Assignee (at issue)
AlliedSignal, 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.