Granted Patent
Utility
US 6,204,297 · App. 08/756,872
Nonionic gemini surfactants
Inventors:
David J. Tracy, Ruoxin Li, Manilal S. Dahanayake, Jiang Yang
Patented Case
View Patent ↗
Granted: Mar 20, 2001
Filed: Nov 26, 1996
Inventors
David J. Tracy
Ruoxin Li
Manilal S. Dahanayake
Jiang Yang
Assignee (at issue)
Rhodia, 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.