Granted Patent
Utility
US 6,299,889 · App. 09/150,806
Stable ascorbic acid preparation for topical use
Inventors:
Lorraine M. Cowton, John A. Duffy, Michele C. Duggan
Patented Case
View Patent ↗
Granted: Oct 9, 2001
Filed: Sep 10, 1998
Inventors
Lorraine M. Cowton
John A. Duffy
Michele C. Duggan
Assignee (at issue)
Avon Products, Inc.
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.