Granted Patent
Utility
US 6,793,726 · App. 10/113,223
Aqueous suspensions with bentonite for mastics and sealants
Inventors:
Michael L. Yap, Raymond T. Hyer, Barton J. Malina
Patented Case
View Patent ↗
Granted: Sep 21, 2004
Filed: Mar 29, 2002
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.