Granted Patent
Utility
US 4,738,836 · App. 06/923,249
Preparation of high bulk density anhydrous sodium carbonate crystals
Inventors:
Rustom P. Poncha, Ronald E. Sorg
Patented Case
View Patent ↗
Granted: Apr 19, 1988
Filed: Oct 27, 1986
Inventors
Rustom P. Poncha
Ronald E. Sorg
Assignee (at issue)
General Chemical Company
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.