Granted Patent
Utility
US 4,433,121 · App. 06/395,472
Polymerization process
Inventors:
Yasunori Kabu, Masayoshi Yasunaka, Yoshinori Morita, Masanori Motowoka
Patented Case
View Patent ↗
Granted: Feb 21, 1984
Filed: Jul 6, 1982
Inventors
Yasunori Kabu
Masayoshi Yasunaka
Yoshinori Morita
Masanori Motowoka
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.