Granted Patent
Utility
US 4,790,940 · App. 07/113,796
Process for wastewater treatment
Inventors:
Frank J. Castaldi, Timothy W. Trofe, Gordon C. Page, Kevin M. Adams
Patented Case
View Patent ↗
Granted: Dec 13, 1988
Filed: Nov 3, 1987
Inventors
Frank J. Castaldi
Timothy W. Trofe
Gordon C. Page
Kevin M. Adams
Assignee (at issue)
Radian Group 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.