Granted Patent
Utility
US 4,323,663 · App. 06/203,649
Process for producing a halogen-containing polycarbonate resin
Inventors:
Hazime Mori, Katsuhisa Kohyama, Katsuhiko Nakamura
Patented Case
View Patent ↗
Granted: Apr 6, 1982
Filed: Nov 3, 1980
Inventors
Hazime Mori
Katsuhisa Kohyama
Katsuhiko Nakamura
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.