Granted Patent
Utility
US 5,223,140 · App. 07/869,484
Biological treatment of combined ink and starch wastewater for use in corrugator adhesive preparation
Inventors:
John RUTHERFORD, Henry L. Peterson
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Apr 15, 1992
Inventors
John RUTHERFORD
Henry L. Peterson
Assignee (at issue)
Inland Container Corporation
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.