Granted Patent
Utility
US 5,037,899 · App. 07/605,150
Lactone-primary amine modified epoxy resin and process for preparing the same
Inventors:
Hideo Nakamura, Masaru Wakizaka, Michio Hashimoto, Yohzoh Yamamoto
Patented Case
View Patent ↗
Granted: Aug 6, 1991
Filed: Oct 31, 1990
Inventors
Hideo Nakamura
Masaru Wakizaka
Michio Hashimoto
Yohzoh Yamamoto
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.