Granted Patent
Utility
US 5,494,978 · App. 08/346,845
Modified polysilazane and process for preparation thereof
Inventors:
Yasuo Shimizu, Yuuji Tashiro, Hiroyuki Aoki, Masaaki Ichiyama, Hayato Nishii, Toshihide Kishi, Kouji Okuda, Takeshi Isoda
Patented Case
View Patent ↗
Granted: Feb 27, 1996
Filed: Nov 30, 1994
Inventors
Yasuo Shimizu
Yuuji Tashiro
Hiroyuki Aoki
Masaaki Ichiyama
Hayato Nishii
Toshihide Kishi
Kouji Okuda
Takeshi Isoda
Assignee (at issue)
Tonen Corporation
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.