Granted Patent
Utility
US 5,231,466 · App. 07/739,278
Capillary fluid stream concentration measuring apparatus and method
Inventors:
Steven R. Erskine, Hernan J. Cortes, Yvonne M. Walbroehl, Curtis D. Pfeiffer
Patented Case
View Patent ↗
Granted: Jul 27, 1993
Filed: Aug 1, 1991
Inventors
Steven R. Erskine
Hernan J. Cortes
Yvonne M. Walbroehl
Curtis D. Pfeiffer
Assignee (at issue)
THE DOW CHEMICAL COMPANY
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.