Granted Patent
Utility
US 5,292,862 · App. 07/778,051
Method for the pyrolysis of polymers
Inventors:
Eigo Miura, Takashi Yamanaka, Ryoji Ohori, Akio Ohdaira, Kenichi Nishiwaki, Yoshikuni Itoh, Yoshinori Morita, Hajime Inagaki
Patented Case
View Patent ↗
Granted: Mar 8, 1994
Filed: Jan 22, 1992
Inventors
Eigo Miura
Takashi Yamanaka
Ryoji Ohori
Akio Ohdaira
Kenichi Nishiwaki
Yoshikuni Itoh
Yoshinori Morita
Hajime Inagaki
Assignee (at issue)
Mitsui Petrochemical Industries, 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.