Granted Patent
Utility
US 6,193,842 · App. 08/906,470
Preparation of insulant boards based on mineral and paper fiber
Inventor:
Manfred Schmuck
Patented Case
View Patent ↗
Granted: Feb 27, 2001
Filed: Aug 5, 1997
Inventor
Manfred Schmuck
Assignee (at issue)
Th. Goldschmidt. AG
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.