Granted Patent
Utility
US 4,981,153 · App. 07/526,253
Method and apparatus for reducing hydrocarbon vapor emission from a storage tank
Inventor:
Thomas K. Perkins
Patented Case
View Patent ↗
Granted: Jan 1, 1991
Filed: May 21, 1990
Inventor
Thomas K. Perkins
Assignee (at issue)
Atlantic Richfield Company
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.