Granted Patent
Utility
US 4,386,192 · App. 06/347,401
Process for the preparation of polymers of definite viscosities
Inventors:
Sameer H. Eldin, Peter Grieshaber
Patented Case
View Patent ↗
Granted: May 31, 1983
Filed: Feb 10, 1982
Inventors
Sameer H. Eldin
Peter Grieshaber
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.