Granted Patent
Utility
US 5,162,402 · App. 07/787,191
Slump retaining agent
Inventors:
Hideo Ogawa, Yoshio Tanaka, Tadashi Tsuchitani
Patented Case
View Patent ↗
Granted: Nov 10, 1992
Filed: Nov 4, 1991
Inventors
Hideo Ogawa
Yoshio Tanaka
Tadashi Tsuchitani
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.