Granted Patent
Utility
US 4,518,502 · App. 06/318,106
Method of extracting organic contaminants from process waters
Inventors:
Eugene A. Burns, Bruce N. Colby
Patented Case
View Patent ↗
Granted: May 21, 1985
Filed: Nov 4, 1981
Inventors
Eugene A. Burns
Bruce N. Colby
Assignee (at issue)
Maxwell 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.