Granted Patent
Utility
US 4,298,561 · App. 06/096,292
Process for preparing calcium silicate shaped product
Inventors:
Mitsuo Uchida, Yasuo Oguri, Junji Saito, Tsukasa Kawahara
Patented Case
View Patent ↗
Granted: Nov 3, 1981
Filed: Nov 21, 1979
Inventors
Mitsuo Uchida
Yasuo Oguri
Junji Saito
Tsukasa Kawahara
Assignee (at issue)
Mitsubishi Chemical Industries, 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.