Granted Patent
Utility
US 6,831,033 · App. 10/171,084
Method of preparing a catalyst for polymerization and copolymerization of ethylene
Inventors:
Chun-Byung Yang, Sang-Yull Kim, Weon Lee
Patented Case
View Patent ↗
Granted: Dec 14, 2004
Filed: Jun 12, 2002
Inventors
Chun-Byung Yang
Sang-Yull Kim
Weon Lee
Assignee (at issue)
Samsung General Chemicals, Co., Ltd.
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.