Granted Patent
Utility
US 6,147,155 · App. 09/328,317
Aqueous polyurethane dispersions containing non-cyclic diisocyanates and a process for their preparation
Inventors:
Kenneth P. Yonek, Yuliya Berezkin
Patented Case
View Patent ↗
Granted: Nov 14, 2000
Filed: Jun 8, 1999
Inventors
Kenneth P. Yonek
Yuliya Berezkin
Assignee (at issue)
Bayer Aktiengesellschaft
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.