Granted Patent
Utility
US 4,545,704 · App. 06/574,996
Method and apparatus for the pneumatic conveyance of fine material
Inventor:
Otto Heinemann
Patented Case
View Patent ↗
Granted: Oct 8, 1985
Filed: Jan 30, 1984
Inventor
Otto Heinemann
Assignee (at issue)
Krupp Polysius 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.