Granted Patent
Utility
US 5,254,280 · App. 07/922,113
Refrigeration compositions having polyoxyalkylene glycols with alkylene groups having at least 4 carbon atoms therein
Inventors:
Raymond H. Thomas, David Nalewajek, Hang T. Pham, David P. Wilson
Patented Case
View Patent ↗
Granted: Oct 19, 1993
Filed: Jul 28, 1992
Inventors
Raymond H. Thomas
David Nalewajek
Hang T. Pham
David P. Wilson
Assignee (at issue)
AlliedSignal, Inc.
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.