Granted Patent
Utility
US 4,433,053 · App. 06/291,762
Fermentation process for the production of poly(.beta.-hydroxy butyric acid)
Inventors:
Lorenzo Hughes, Kenneth R. Richardson
Patented Case
View Patent ↗
Granted: Feb 21, 1984
Filed: Aug 10, 1981
Inventors
Lorenzo Hughes
Kenneth R. Richardson
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.