Granted Patent
Utility
US 6,284,279 · App. 09/453,685
Phenothiazine in prill form and method for making the same
Inventor:
David Vanzin
Patented Case
View Patent ↗
Granted: Sep 4, 2001
Filed: Dec 3, 1999
Inventor
David Vanzin
Assignee (at issue)
Avecia 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.