Granted Patent
Utility
US 6,133,374 · App. 09/218,272
Polypropylene resin compositions
Inventors:
Byeong Uk Nam, Young-Keun Lee, Tae Hee Lee, Kyu Jong Lee
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: Dec 21, 1998
Inventors
Byeong Uk Nam
Young-Keun Lee
Tae Hee Lee
Kyu Jong Lee
Assignee (at issue)
SK HOLDINGS 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.