Granted Patent
Utility
US 4,425,235 · App. 06/360,706
Blood collection device with phase partitioning means
Inventors:
William D. Cornell, Joel A. Joslin
Patented Case
View Patent ↗
Granted: Jan 10, 1984
Filed: Mar 22, 1982
Inventors
William D. Cornell
Joel A. Joslin
Assignee (at issue)
Sherwood Medical Company
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.