Granted Patent
Utility
US 4,826,313 · App. 07/201,262
Method of analysis
Inventors:
Rudolf W. Schar, Rita Hofmann-Sievert
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: May 31, 1988
Inventors
Rudolf W. Schar
Rita Hofmann-Sievert
Assignee (at issue)
Ciba-Geigy
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.