Granted Patent
Utility
US 4,575,240 · App. 06/502,943
Visible sample chamber for fluid analysis
Inventors:
Craig N. Hess, Robert S. Potts
Patented Case
View Patent ↗
Granted: Mar 11, 1986
Filed: Jun 10, 1983
Inventors
Craig N. Hess
Robert S. Potts
Assignee (at issue)
Corning Glass Works
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.