Granted Patent
Utility
US 4,822,739 · App. 06/814,179
Partition proficiency in genetically engineered plasmids for transforming gram-positive organisms
Inventor:
Shing Chang
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Dec 24, 1985
Inventor
Shing Chang
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.