Granted Patent
Utility
US 4,731,994 · App. 07/030,186
Apparatus for burning solid particles in the exhaust gas of internal combustion engines
Inventors:
Hubert Dettling, Rolf Leonhard, Ulrich Projahn
Patented Case
View Patent ↗
Granted: Mar 22, 1988
Filed: Mar 26, 1987
Inventors
Hubert Dettling
Rolf Leonhard
Ulrich Projahn
Assignee (at issue)
Robert Bosch 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.