Granted Patent
Utility
US 4,606,859 · App. 06/714,673
Infra-red absorber
Inventors:
Peter J. Duggan, Paul F. Gordon
Patented Case
View Patent ↗
Granted: Aug 19, 1986
Filed: Mar 21, 1985
Inventors
Peter J. Duggan
Paul F. Gordon
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES 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.