Granted Patent
Utility
US 6,524,381 · App. 09/539,695
Methods for producing enhanced interference pigments
Inventors:
Roger W. Phillips, Vladimir P. Raksha
Patented Case
View Patent ↗
Granted: Feb 25, 2003
Filed: Mar 31, 2000
Inventors
Roger W. Phillips
Vladimir P. Raksha
Assignee (at issue)
Flex 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.