Granted Patent
Utility
US 6,460,310 · App. 09/670,088
Composite I-beam having improved properties
Inventors:
Brian M. Ford, Daniel W. Krassowski
Patented Case
View Patent ↗
Granted: Oct 8, 2002
Filed: Sep 26, 2000
Inventors
Brian M. Ford
Daniel W. Krassowski
Assignee (at issue)
GraftTech 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.