Granted Patent
Utility
US 4,439,175 · App. 06/311,104
Apparatus for forming thermal insulation blocks
Inventors:
Anthony E. Cimochowski, Brad A. Heffelmire
Patented Case
View Patent ↗
Granted: Mar 27, 1984
Filed: Oct 13, 1981
Inventors
Anthony E. Cimochowski
Brad A. Heffelmire
Assignee (at issue)
Manville Service 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.