Granted Patent
Utility
US 4,366,136 · App. 06/317,959
Moldable prepolymers based on alkali metal silicates and alkaline earth metal silicates
Inventors:
Peter Kartschmaroff, Ewald Forster, Armin Schaffner
Patented Case
View Patent ↗
Granted: Dec 28, 1982
Filed: Nov 4, 1981
Inventors
Peter Kartschmaroff
Ewald Forster
Armin Schaffner
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.