Granted Patent
Utility
US 4,574,012 · App. 06/453,828
Calcium silicate shaped product
Inventors:
Yasuo Oguri, Mitsuru Awata, Noriyuki Ariyama
Patented Case
View Patent ↗
Granted: Mar 4, 1986
Filed: Dec 28, 1982
Inventors
Yasuo Oguri
Mitsuru Awata
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.