Granted Patent
Utility
US 6,277,191 · App. 09/719,361
Air entrainment with polyoxyalkylene copolymers for concrete treated with oxyalkylene SRA
Inventors:
Noah D. Budiansky, Brent Williams, Byong-Wa Chun
Patented Case
View Patent ↗
Granted: Aug 21, 2001
Filed: Dec 11, 2000
Inventors
Noah D. Budiansky
Brent Williams
Byong-Wa Chun
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.