Granted Patent
Utility
US 6,187,841 · App. 08/679,278
Cement composition using the dispersant of (meth)acrylic esters, (metha)acrylic acids polymers
Inventors:
Yoshio Tanaka, Akira Ohta, Tsuyoshi Hirata, Toru Uno, Tsutomu Yuasa, Hideyuki Tahara
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Jul 12, 1996
Inventors
Yoshio Tanaka
Akira Ohta
Tsuyoshi Hirata
Toru Uno
Tsutomu Yuasa
Hideyuki Tahara
Assignee (at issue)
MBT Holding 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.