Granted Patent
Utility
US 4,859,752 · App. 07/096,106
Alkene/excess maleic anhydride polymer manufacture
Inventors:
Thomas P. Bosanec, Kenneth R. Lukow, Calvin J. Verbrugge
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: Sep 11, 1987
Inventors
Thomas P. Bosanec
Kenneth R. Lukow
Calvin J. Verbrugge
Assignee (at issue)
S. C. JOHNSON & SON, 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.