Granted Patent
Utility
US 4,964,936 · App. 07/255,447
Method of making foam-filled cellular structures
Inventor:
Gregory A. Ferro
Patented Case
View Patent ↗
Granted: Oct 23, 1990
Filed: Oct 11, 1988
Inventor
Gregory A. Ferro
Assignee (at issue)
Imi-Tech 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.