Granted Patent
Utility
US 5,087,689 · App. 07/611,471
Polyimide and high-temperature adhesive of polyimide based on meta-phenoxy diamines
Inventors:
Masahiro Ohta, Saburo Kawashima, Yoshiho Sonobe, Shoji Tamai, Hideaki Oikawa, Kouji Ohkoshi, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Feb 11, 1992
Filed: Nov 9, 1990
Inventors
Masahiro Ohta
Saburo Kawashima
Yoshiho Sonobe
Shoji Tamai
Hideaki Oikawa
Kouji Ohkoshi
Akihiro Yamaguchi
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.