Granted Patent
Utility
US 4,279,664 · App. 06/138,486
Azeotrope-like compositions of trichlorotrifluoroethane, acetone and n-hexane
Inventors:
Francis J. Figiel, Aaron Colbert
Patented Case
View Patent ↗
Granted: Jul 21, 1981
Filed: Apr 9, 1980
Inventors
Francis J. Figiel
Aaron Colbert
Assignee (at issue)
Allied Chemical 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.