Granted Patent
Utility
US 4,239,526 · App. 06/071,959
Substituted ureas as sugarcane ripeners
Inventor:
Sidney R. Siemer
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Sep 4, 1979
Inventor
Sidney R. Siemer
Assignee (at issue)
W. R. Grace & Co.
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.