Granted Patent
Utility
US 4,877,654 · App. 07/189,146
Buffered silane emulsions for rendering porous substrates water repellent
Inventor:
Michael E. Wilson
Patented Case
View Patent ↗
Granted: Oct 31, 1989
Filed: May 2, 1988
Inventor
Michael E. Wilson
Assignee (at issue)
PCR, Inc.
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.