Granted Patent
Utility
US 4,339,902 · App. 06/164,477
Multiple layer thermal insulation device
Inventors:
Anthony E. Cimochowski, Brad A. Heffelmire
Patented Case
View Patent ↗
Granted: Jul 20, 1982
Filed: Jun 30, 1980
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.