Granted Patent
Utility
US 4,919,889 · App. 07/244,984
Sample collection and transport fluid composition
Inventors:
Lynn A. Jones, Lloyd H. Smith, Nelson N. H. Teng
Patented Case
View Patent ↗
Granted: Apr 24, 1990
Filed: Sep 15, 1988
Inventors
Lynn A. Jones
Lloyd H. Smith
Nelson N. H. Teng
Assignee (at issue)
Aspen Diagnostics Corporation
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.