Granted Patent
Utility
US 5,222,920 · App. 07/893,753
Chain including roller sealing arrangement
Inventors:
Robert R. Cheesman, Russell H. C. Uttke
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Jun 5, 1992
Inventors
Robert R. Cheesman
Russell H. C. Uttke
Assignee (at issue)
REXNORD 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.