Granted Patent
Utility
US 4,284,352 · App. 06/050,326
Heat exchanger for refractometer
Inventors:
William W. Carson, John S. Roe
Patented Case
View Patent ↗
Granted: Aug 18, 1981
Filed: Jun 20, 1979
Inventors
William W. Carson
John S. Roe
Assignee (at issue)
WATERS GMBH
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.