Granted Patent
Utility
US 5,843,731 · App. 08/922,376
Method for purifying plasmid DNA on calcium phosphate compound
Inventor:
Akira Yamamoto
Patented Case
View Patent ↗
Granted: Dec 1, 1998
Filed: Sep 3, 1997
Inventor
Akira Yamamoto
Assignee (at issue)
Asahi Kogaku Kogyo Kabushiki Kaisha
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.