Granted Patent
Utility
US 4,686,027 · App. 06/751,048
Asphalt coking method
Inventors:
Jorge A. Bonilla, John Daniel Elliott
Patented Case
View Patent ↗
Granted: Aug 11, 1987
Filed: Jul 2, 1985
Inventors
Jorge A. Bonilla
John Daniel Elliott
Assignee (at issue)
Foster Wheeler USA 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.