Granted Patent
Utility
US 4,744,865 · App. 06/870,212
Process for controlling pitch deposition from pulp in papermaking systems
Inventors:
David D. Dreisbach, Gilbert S. Gomes
Patented Case
View Patent ↗
Granted: May 17, 1988
Filed: Jun 3, 1986
Inventors
David D. Dreisbach
Gilbert S. Gomes
Assignee (at issue)
Betz Laboratories, 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.