Granted Patent
Utility
US 5,318,199 · App. 07/830,896
Gate seal for asphalt storage silo
Inventor:
David F. Brashears
Patented Case
View Patent ↗
Granted: Jun 7, 1994
Filed: Feb 4, 1992
Inventor
David F. Brashears
Assignee (at issue)
GENCOR INDUSTRIES, 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.