Granted Patent
Utility
US 5,522,927 · App. 08/449,318
Air entrainment compositions for cement compositions
Inventor:
Timothy Hegge
Patented Case
View Patent ↗
Granted: Jun 4, 1996
Filed: May 24, 1995
Inventor
Timothy Hegge
Assignee (at issue)
Henkel Limited
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.