Granted Patent
Utility
US 6,077,394 · App. 09/281,368
Retention and drainage in alkaline fine paper
Inventors:
Gavin G. Spence, Duane R. Palmateer, James R. Yarnell
Patented Case
View Patent ↗
Granted: Jun 20, 2000
Filed: Mar 30, 1999
Inventors
Gavin G. Spence
Duane R. Palmateer
James R. Yarnell
Assignee (at issue)
Callaway Chemical Corp.
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.