Granted Patent
Utility
US 5,929,183 · App. 07/563,887
Polyfunctional polymers as deinking agents
Inventors:
Ratana Kanluen, Brigitte H. Licht
Patented Case
View Patent ↗
Granted: Jul 27, 1999
Filed: Aug 6, 1990
Inventors
Ratana Kanluen
Brigitte H. Licht
Assignee (at issue)
HUNTSMAN PETROCHEMICAL LLC
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.