Granted Patent
Utility
US 6,692,564 · App. 10/164,348
Preparation of concrete accelerator
Inventor:
Thomas Hofmann
Patented Case
View Patent ↗
Granted: Feb 17, 2004
Filed: Jun 6, 2002
Inventor
Thomas Hofmann
Assignee (at issue)
MBT (Schweiz) 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.