Granted Patent
Utility
US 4,889,818 · App. 07/063,509
Purified thermostable enzyme
Inventors:
David H. Gelfand, Susanne Stoffel, Frances C. Lawyer, Randall K. Saiki
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Jun 17, 1987
Inventors
David H. Gelfand
Susanne Stoffel
Frances C. Lawyer
Randall K. Saiki
Assignee (at issue)
Cetus 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.