Granted Patent
Utility
US 6,652,637 · App. 09/869,352
Disazo dyes and inks containing them
Inventors:
Prahalad Manibhai Mistry, Roy Bradbury
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Jun 28, 2001
Inventors
Prahalad Manibhai Mistry
Roy Bradbury
Assignee (at issue)
Avecia 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.