Granted Patent
Utility
US 5,691,148 · App. 08/328,954
Petroleum immunoassay method, its components and a kit for use in performing the same
Inventors:
Stephen B. Friedman, Randy L. Allen
Patented Case
View Patent ↗
Granted: Nov 25, 1997
Filed: Oct 24, 1994
Inventors
Stephen B. Friedman
Randy L. Allen
Assignee (at issue)
Ensys, 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.