Granted Patent
Utility
US 5,917,035 · App. 09/039,733
Oxazine dyes, their preparation and the use thereof
Inventors:
Hanspeter Birri, Gerhard Hanika, Alex Nicopoulos
Patented Case
View Patent ↗
Granted: Jun 29, 1999
Filed: Mar 16, 1998
Inventors
Hanspeter Birri
Gerhard Hanika
Alex Nicopoulos
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.