Granted Patent
Utility
US 4,435,507 · App. 06/355,588
Process and device for preparation of cell samples for cytological tests
Inventor:
Bjorn G. Stenkvist
Patented Case
View Patent ↗
Granted: Mar 6, 1984
Filed: Feb 18, 1982
Inventor
Bjorn G. Stenkvist
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.