Granted Patent
Utility
US 6,409,952 · App. 09/443,694
Drying and processing cellulosic compounds
Inventors:
Wayne E. Hacker, Matthew F. Kollar, Robert W. Heigel
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: Nov 19, 1999
Inventors
Wayne E. Hacker
Matthew F. Kollar
Robert W. Heigel
Assignee (at issue)
Crane Plastics Company LLC
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.