Granted Patent
Utility
US 6,287,423 · App. 09/286,745
Paper composition for improved sheet properties
Inventors:
Donald Kendall Drummond, Patrick Clinton Wernett
Patented Case
View Patent ↗
Granted: Sep 11, 2001
Filed: Apr 6, 1999
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.