Granted Patent
Utility
US 5,505,899 · App. 08/260,895
Process for producing bodies based on boron carbide by pressureless sintering
Inventors:
Lorenz Sigl, Hubert Thaler, Karl-Alexander Schwetz
Patented Case
View Patent ↗
Granted: Apr 9, 1996
Filed: Jun 16, 1994
Inventors
Lorenz Sigl
Hubert Thaler
Karl-Alexander Schwetz
Assignee (at issue)
Elektroschmelzwerk Kempten GmbH
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.