Granted Patent
Utility
US 5,135,968 · App. 07/691,459
Methods and apparatus for treating wastewater
Inventors:
Carl L. Brazelton, Yong-Ha Kim
Patented Case
View Patent ↗
Granted: Aug 4, 1992
Filed: Apr 25, 1981
Inventors
Carl L. Brazelton
Yong-Ha Kim
Assignee (at issue)
Stranco, 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.