Granted Patent
Utility
US 5,658,634 · App. 07/899,948
Heat barrier laminate
Inventors:
G. William Ragland, Boyd A. Barnard, William M. Sheridan
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Jun 17, 1992
Inventors
G. William Ragland
Boyd A. Barnard
William M. Sheridan
Assignee (at issue)
ATD 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.