Granted Patent
Utility
US 4,631,073 · App. 06/752,098
Method and apparatus for theadsorptive fractionation of gases
Inventors:
Robert A. Null, Lonnie C. Laughlin, Michael Goldberg
Patented Case
View Patent ↗
Granted: Dec 23, 1986
Filed: Jul 5, 1985
Inventors
Robert A. Null
Lonnie C. Laughlin
Michael Goldberg
Assignee (at issue)
Wilkerson 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.