Granted Patent
Utility
US 6,201,090 · App. 09/463,983
Propylene/ethylene block copolymer
Inventors:
Takashi Sumitomo, Sueto Miyazaki, Tsuyoshi Ota, Kazuo Sato
Patented Case
View Patent ↗
Granted: Mar 13, 2001
Filed: Feb 16, 2000
Inventors
Takashi Sumitomo
Sueto Miyazaki
Tsuyoshi Ota
Kazuo Sato
Assignee (at issue)
Idemitsu Petrochemical 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.