Granted Patent
Utility
US 4,671,874 · App. 06/358,002
Continuous dewatering apparatus
Inventors:
Henry A. Fremont, William C. Dorman
Patented Case
View Patent ↗
Granted: Jun 9, 1987
Filed: Mar 15, 1982
Inventors
Henry A. Fremont
William C. Dorman
Assignee (at issue)
Champion International Corporation Limited
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.