Granted Patent
Utility
US 5,834,577 · App. 08/891,717
Process for producing an oil sorbent copolymer and the product thereof
Inventor:
Milan F. Sojka
Patented Case
View Patent ↗
Granted: Nov 10, 1998
Filed: Jul 11, 1997
Inventor
Milan F. Sojka
Assignee (at issue)
AMCOL INTERNATIONAL 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.