Granted Patent
Utility
US 4,490,320 · App. 06/454,174
Process for preparing a calcium silicate shaped product
Inventors:
Yasuo Oguri, Mitsuru Awata, Junji Saito, Soichi Inoue, Noriyuki Ariyama
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Dec 28, 1982
Inventors
Yasuo Oguri
Mitsuru Awata
Junji Saito
Soichi Inoue
Noriyuki Ariyama
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.