Granted Patent
Utility
US 6,550,707 · App. 09/755,705
Gyratory crusher dust seal system
Inventors:
Brek M. Zortman, Albert Van Mullem
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Jan 5, 2001
Inventors
Brek M. Zortman
Albert Van Mullem
Assignee (at issue)
SANDVIK AB
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.