Granted Patent
Utility
US 4,431,600 · App. 06/340,665
Extrusion molding of polyamidoimide resins
Inventors:
Kunisuke Sakamoto, Junichi Yoshimura, Isamu Shiga
Patented Case
View Patent ↗
Granted: Feb 14, 1984
Filed: Jan 19, 1982
Inventors
Kunisuke Sakamoto
Junichi Yoshimura
Isamu Shiga
Assignee (at issue)
Mitsubishi Chemical 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.