Granted Patent
Utility
US 5,449,725 · App. 07/800,178
Polyfunctional polymers as deinking agents
Inventors:
Ratana Kanluen, Brigitte H. Licht
Patented Case
View Patent ↗
Granted: Sep 12, 1995
Filed: Nov 27, 1991
Inventors
Ratana Kanluen
Brigitte H. Licht
Assignee (at issue)
HUNTSMAN 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.