Granted Patent
Utility
US 6,649,311 · App. 09/744,229
Color changing composition and coloring polymeric articles made therefrom
Inventors:
Dianne Beth Shirley, Ian Malcolm Shirley, Ajay Popat, Martin Russell Edwards, Kevin McAloon, Herbert B. Scher
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: May 2, 2001
Inventors
Dianne Beth Shirley
Ian Malcolm Shirley
Ajay Popat
Martin Russell Edwards
Kevin McAloon
Herbert B. Scher
Assignee (at issue)
Vantico 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.