Granted Patent
Utility
US 4,952,679 · App. 07/233,782
Fiber-reactive dyes containing a 5-formylpyrimidine moiety
Inventor:
Karl Hoegerle
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Aug 19, 1988
Inventor
Karl Hoegerle
Assignee (at issue)
Ciba-Geigy
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.