Granted Patent
Utility
US 5,904,307 · App. 09/062,109
Pulverizer apparatus with horizontal axis pivot scraper
Inventors:
Robert S. Prairie, Ronald P. Przybycien
Patented Case
View Patent ↗
Granted: May 18, 1999
Filed: Apr 17, 1998
Inventors
Robert S. Prairie
Ronald P. Przybycien
Assignee (at issue)
Combustion Engineering, Inc.
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.