Granted Patent
Utility
US 6,812,270 · App. 10/214,941
Process of producing highly homogeneous cellulose solution
Inventors:
Tae-Jung Lee, Soo-Myung Choi, Yun-Hyuk Bang, Seok-Jong Han
Patented Case
View Patent ↗
Granted: Nov 2, 2004
Filed: Aug 9, 2002
Inventors
Tae-Jung Lee
Soo-Myung Choi
Yun-Hyuk Bang
Seok-Jong Han
Assignee (at issue)
HYOSUNG 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.