Granted Patent
Utility
US 4,500,277 · App. 06/455,618
Apparatus for thermoforming thermoplastic sheet materials
Inventors:
Lance Bullock, Josip Vlahek, Ferenc Kovacs
Patented Case
View Patent ↗
Granted: Feb 19, 1985
Filed: Jan 4, 1983
Inventors
Lance Bullock
Josip Vlahek
Ferenc Kovacs
Assignee (at issue)
W. R. Grace Australia Limited
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.