Granted Patent
Utility
US 5,540,553 · App. 08/433,026
Heat-resistant resin compositions and internal combustion engine parts using same
Inventors:
Yoshihisa Goto, Toshihiko Tsutsumi, Toshiaki Takahashi, Takatoshi Sagawa
Patented Case
View Patent ↗
Granted: Jul 30, 1996
Filed: May 3, 1995
Inventors
Yoshihisa Goto
Toshihiko Tsutsumi
Toshiaki Takahashi
Takatoshi Sagawa
Assignees (at issue)
Mitsui Toatsu Chemicals, Incorporated
Nissan Motor Co., 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.