Granted Patent
Utility
US 5,113,939 · App. 07/579,371
Single bore packer with dual flow conversion for gas lift completion
Inventors:
Colby M. Ross, Richard M. Sproul, Ross M. McCurley, Carter R. Young
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: Sep 6, 1990
Inventors
Colby M. Ross
Richard M. Sproul
Ross M. McCurley
Carter R. Young
Assignee (at issue)
Otis Engineering 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.