Granted Patent
Utility
US 5,308,756 · App. 07/796,032
Protein S chromogenic assay
Inventors:
Piet van de Waart, Barry Woodhams
Patented Case
View Patent ↗
Granted: May 3, 1994
Filed: Nov 20, 1991
Inventors
Piet van de Waart
Barry Woodhams
Assignee (at issue)
Baxter Diagnostics Inc.
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.