Granted Patent
Utility
US 5,618,340 · App. 08/684,129
Asphalt-based coating composition with ether amine-acid-complex surfactant
Inventors:
James A. Krogh, Michael R. Sipe
Patented Case
View Patent ↗
Granted: Apr 8, 1997
Filed: Jul 19, 1996
Inventors
James A. Krogh
Michael R. Sipe
Assignee (at issue)
Tomah 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.