Granted Patent
Utility
US 5,997,630 · App. 08/672,822
Concrete accelerators
Inventors:
Terye Angelskar, Helmut Gebhardt, Bernhard Leikauf, Valentina Mader
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: Jun 28, 1996
Inventors
Terye Angelskar
Helmut Gebhardt
Bernhard Leikauf
Valentina Mader
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.