Granted Patent
Utility
US 5,358,566 · App. 07/609,288
Cement dispersing agent
Inventors:
Yoshio Tanaka, Minoru Yaguchi, Teruhiko Yamamoto
Patented Case
View Patent ↗
Granted: Oct 25, 1994
Filed: Nov 5, 1990
Inventors
Yoshio Tanaka
Minoru Yaguchi
Teruhiko Yamamoto
Assignee (at issue)
Sandoz AG
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.