Granted Patent
Utility
US 6,776,833 · App. 10/365,880
Emulsion of bitumen in a colloidal clay and water slurry
Inventors:
Michael L. Yap, Raymont T. Hyer, Barton J. Malina
Patented Case
View Patent ↗
Granted: Aug 17, 2004
Filed: Feb 13, 2003
Inventors
Michael L. Yap
Raymont 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.