Granted Patent
Utility
US 5,786,427 · App. 08/873,454
Highly rigid propylenic resin and blow molded article made therefrom
Inventors:
Masato Kijima, Masayuki Shinohara, Minoru Sugawara, Koki Hirano
Patented Case
View Patent ↗
Granted: Jul 28, 1998
Filed: Jun 12, 1997
Inventors
Masato Kijima
Masayuki Shinohara
Minoru Sugawara
Koki Hirano
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.