Granted Patent
Utility
US 6,613,856 · App. 09/578,066
Bifunctional polymers
Inventors:
Donald Kendall Drummond, Patrick Clinton Wernett
Patented Case
View Patent ↗
Granted: Sep 2, 2003
Filed: May 24, 2000
Inventors
Donald Kendall Drummond
Patrick Clinton Wernett
Assignee (at issue)
Minerals Technologies 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.