Granted Patent
Utility
US 6,310,218 · App. 08/231,964
Melt crystallization purification of lactides
Inventors:
William G. O'Brien, Gilbert Jacob Sloan
Patented Case
View Patent ↗
Granted: Oct 30, 2001
Filed: Apr 22, 1994
Inventors
William G. O'Brien
Gilbert Jacob Sloan
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.