Granted Patent
Utility
US 5,032,447 · App. 07/204,064
Fire barrier material
Inventor:
Douglas J. Bailey
Patented Case
View Patent ↗
Granted: Jul 16, 1991
Filed: Jun 8, 1988
Inventor
Douglas J. Bailey
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.