Granted Patent
Utility
US 4,231,726 · App. 05/918,123
Gear pump having fluid deaeration capability
Inventors:
Delwin E. Cobb, Maurice E. Young
Patented Case
View Patent ↗
Granted: Nov 4, 1980
Filed: Jun 22, 1978
Inventors
Delwin E. Cobb
Maurice E. Young
Assignee (at issue)
Caterpillar Tractor Co.
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.