Granted Patent
Utility
US 4,810,641 · App. 06/840,763
Biochemical assays
Inventors:
Paul E. Gisby, Roger D. Newell, Peter B. Park
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Mar 18, 1986
Inventors
Paul E. Gisby
Roger D. Newell
Peter B. Park
Assignee (at issue)
British Gas
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.