Granted Patent
Utility
US 4,965,058 · App. 07/382,713
Polysiloxazanes, silicon oxynitride fibers and processes for producing same
Inventors:
Osamu Funayama, Mikiro Arai, Hayato Nishii, Takeshi Isoda
Patented Case
View Patent ↗
Granted: Oct 23, 1990
Filed: Jul 19, 1989
Inventors
Osamu Funayama
Mikiro Arai
Hayato Nishii
Takeshi Isoda
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.