Granted Patent
Utility
US 6,071,613 · App. 09/185,253
Fiber reinforced cementitious materials with improved toughness and ductility
Inventors:
Klaus-Alexander Rieder, Neal S. Berke
Patented Case
View Patent ↗
Granted: Jun 6, 2000
Filed: Nov 3, 1998
Inventors
Klaus-Alexander Rieder
Neal S. Berke
Assignee (at issue)
W.R. Grace & Co. Conn.
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.