Granted Patent
Utility
US 5,449,712 · App. 08/003,636
Organosilicon emulsions for rendering porous substrates water repellent
Inventors:
Mark A. Gierke, Christine L. Vidal, Michael E. Wilson
Patented Case
View Patent ↗
Granted: Sep 12, 1995
Filed: Jan 13, 1993
Inventors
Mark A. Gierke
Christine L. Vidal
Michael E. Wilson
Assignee (at issue)
Thoro System Products, 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.