Granted Patent
Utility
US 6,046,356 · App. 09/263,469
Preparation of solutions of betaine
Inventors:
Dorai Ramprasad, William Eamon Carroll, Francis J. Waller
Patented Case
View Patent ↗
Granted: Apr 4, 2000
Filed: Mar 5, 1999
Inventors
Dorai Ramprasad
William Eamon Carroll
Francis J. Waller
Assignee (at issue)
Air Products and Chemicals, Inc.
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.