Granted Patent
Utility
US 5,858,549 · App. 08/783,350
(Hydroxyalkyl)urea crosslinking agents
Inventors:
Andrew J. Kielbania, Jr., Pravin Kukkala, Sharon P. Lee, John C. Leighton
Patented Case
View Patent ↗
Granted: Jan 12, 1999
Filed: Jan 7, 1997
Inventors
Andrew J. Kielbania, Jr.
Pravin Kukkala
Sharon P. Lee
John C. Leighton
Assignee (at issue)
National Starch and Chemical Investment Holding Copporation
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.