Granted Patent
Utility
US 5,149,643 · App. 07/792,667
Method for the production of granular citric acid and salts thereof
Inventors:
Helmut Mothes, Bhalchandra H. Patwardhan, Theo G. Schroeder, David J. Solow
Patented Case
View Patent ↗
Granted: Sep 22, 1992
Filed: Nov 15, 1991
Inventors
Helmut Mothes
Bhalchandra H. Patwardhan
Theo G. Schroeder
David J. Solow
Assignee (at issue)
Haarmann & Beimer
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.