Granted Patent
Utility
US 4,782,132 · App. 07/000,853
Process for producing a copolyester
Inventors:
Seiichi Nozawa, Osamu Kishiro, Atsushi Kasai, Seigo Okumura, Ken Honma, Chieko Muramoto
Patented Case
View Patent ↗
Granted: Nov 1, 1988
Filed: Jan 6, 1987
Inventors
Seiichi Nozawa
Osamu Kishiro
Atsushi Kasai
Seigo Okumura
Ken Honma
Chieko Muramoto
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.