Granted Patent
Utility
US 6,069,217 · App. 08/813,192
Urethane-acrylic copolymer thickening compositions for aqueous systems
Inventors:
Hemi N. Nae, Alice C. Eng
Patented Case
View Patent ↗
Granted: May 30, 2000
Filed: Mar 7, 1997
Inventors
Hemi N. Nae
Alice C. Eng
Assignee (at issue)
Rheox Inc.
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.