Granted Patent
Utility
US 4,840,778 · App. 06/801,884
Inorganic polysilazane and method of producing the same
Inventors:
Mikiro Arai, Takeshi Isoda, Takuji Itoh
Patented Case
View Patent ↗
Granted: Jun 20, 1989
Filed: Nov 26, 1985
Inventors
Mikiro Arai
Takeshi Isoda
Takuji Itoh
Assignee (at issue)
Toa Nenryo Kogyo Kabushiki Kaisha
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.