Granted Patent
Utility
US 5,237,044 · App. 07/422,895
Polyimide sheet and preparation process of the sheet
Inventors:
Masumi Saruwatari, Shoichi Tsuji, Masami Nakano, Shinobu Moriya, Masahiro Ohta, Toshiyuki Nakakura
Patented Case
View Patent ↗
Granted: Aug 17, 1993
Filed: Oct 17, 1989
Inventors
Masumi Saruwatari
Shoichi Tsuji
Masami Nakano
Shinobu Moriya
Masahiro Ohta
Toshiyuki Nakakura
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.