Granted Patent
Utility
US 6,616,743 · App. 09/887,383
Aqueous emulsions, with bentonite for cold application bitumen
Inventors:
Michael L. Yap, Raymond T. Hyer, Barton J. Malina
Patented Case
View Patent ↗
Granted: Sep 9, 2003
Filed: Jun 22, 2001
Inventors
Michael L. Yap
Raymond T. Hyer
Barton J. Malina
Assignee (at issue)
Gardner Asphalt Corporation
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.