Granted Patent
Utility
US 4,906,329 · App. 07/062,423
Flash-drying process for a solvent solution of a polymer or copolymer
Inventors:
Kenichi Tominari, Yuzi Miura, Kunio Furutachi, Yoshihiro Tsukamoto
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Jun 16, 1987
Inventors
Kenichi Tominari
Yuzi Miura
Kunio Furutachi
Yoshihiro Tsukamoto
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.