Granted Patent
Utility
US 4,354,986 · App. 06/156,332
Process for manufacturing boron nitride fiber mats using a needler
Inventors:
Jacob W. Maczuga, Daniel Wilhelm
Patented Case
View Patent ↗
Granted: Oct 19, 1982
Filed: Jun 4, 1980
Inventors
Jacob W. Maczuga
Daniel Wilhelm
Assignee (at issue)
Kennecott Holdings Company
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.