Granted Patent
Utility
US 6,447,906 · App. 09/451,752
Fireplace articles comprising non-white inorganic fibers and method of preparation
Inventors:
Michael J. Andrejcak, Bruce K. Zoitos
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Nov 30, 1999
Inventors
Michael J. Andrejcak
Bruce K. Zoitos
Assignee (at issue)
Unifrax LLC
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.