Granted Patent
Utility
US 4,810,753 · App. 06/921,387
Process for producing polyamide
Inventors:
Shinichiro Koga, Masaaki Miyamoto, Hidemi Nakanishi
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Oct 22, 1986
Inventors
Shinichiro Koga
Masaaki Miyamoto
Hidemi Nakanishi
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.