Granted Patent
Utility
US 4,381,260 · App. 06/284,388
Aromatic chromophoric substituted polysiloxane dyes
Inventors:
Nan S. Chu, Lawrence Marlin
Patented Case
View Patent ↗
Granted: Apr 26, 1983
Filed: Jul 17, 1981
Inventors
Nan S. Chu
Lawrence Marlin
Assignee (at issue)
Union Carbide 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.