Granted Patent
Utility
US 5,837,761 · App. 08/723,729
Pigmented plastics compositions
Inventors:
Ian Alexander Macpherson, Iain Frank Fraser, Alison MacLennan
Patented Case
View Patent ↗
Granted: Nov 17, 1998
Filed: Sep 30, 1996
Inventors
Ian Alexander Macpherson
Iain Frank Fraser
Alison MacLennan
Assignee (at issue)
Ciba Specialty Chemicals Corporation
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.