Granted Patent
Utility
US 4,559,162 · App. 06/353,309
Compositions of polymers based on acrylic acid, solvents, surfactants and, if appropriate, silicone oils, their preparation and their use as anti-foams and deaerating agents
Inventors:
Heinz Abel, Rosemarie Topfl
Patented Case
View Patent ↗
Granted: Dec 17, 1985
Filed: Mar 1, 1982
Inventors
Heinz Abel
Rosemarie Topfl
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.