Granted Patent
Utility
US 4,515,832 · App. 05/809,570
Method for coating the inside of pipe
Inventors:
Charles L. Roeder, William J. Siefert, Frederik Theijsmeijer
Patented Case
View Patent ↗
Granted: May 7, 1985
Filed: Jun 24, 1977
Inventors
Charles L. Roeder
William J. Siefert
Frederik Theijsmeijer
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.