Granted Patent
Utility
US 4,229,557 · App. 06/070,216
Process for the production of white melamine-phenol-aldehyde resins which are resistant to yellowing
Inventors:
Dieter Feinauer, Ludwig Streinz
Patented Case
View Patent ↗
Granted: Oct 21, 1980
Filed: Aug 27, 1979
Inventors
Dieter Feinauer
Ludwig Streinz
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.