Granted Patent
Utility
US 6,037,000 · App. 08/793,412
Dye migration
Inventors:
Howard Chang, Indrajit N. Desai, Arthur Vinen
Patented Case
View Patent ↗
Granted: Mar 14, 2000
Filed: May 14, 1998
Inventors
Howard Chang
Indrajit N. Desai
Arthur Vinen
Assignee (at issue)
SmithKline Beecham 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.