Granted Patent
Utility
US 4,480,106 · App. 06/435,593
Process for the preparation of asymmetrically substituted maleic anhydrides, and asymmetrically substituted maleic anhydrides
Inventors:
Werner Breitenstein, Marcus Baumann, Hans Bosshard
Patented Case
View Patent ↗
Granted: Oct 30, 1984
Filed: Oct 21, 1982
Inventors
Werner Breitenstein
Marcus Baumann
Hans Bosshard
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.