Granted Patent
Utility
US 5,994,475 · App. 08/886,308
Reaction products of amine and a carboxyl functional microgel
Inventors:
Martin Roth, Qian Tang, Sameer H. Eldin
Patented Case
View Patent ↗
Granted: Nov 30, 1999
Filed: Jul 1, 1997
Inventors
Martin Roth
Qian Tang
Sameer H. Eldin
Assignee (at issue)
Ciba Specialty Chemicals 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.