Granted Patent
Utility
US 4,917,706 · App. 07/145,545
Liquid compositions of prereduced sulfur dyes and production thereof
Inventor:
Laszlo A. Meszaros
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Feb 1, 1988
Inventor
Laszlo A. Meszaros
Assignee (at issue)
Sandoz AG
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.