Granted Patent
Utility
US 6,057,463 · App. 08/641,121
N-acylaminoalkane sulfonate and amphoteric surfactant blends and methods for preparing the same
Inventors:
David J. Tracy, Paul F. D'Angelo
Patented Case
View Patent ↗
Granted: May 2, 2000
Filed: Apr 30, 1996
Inventors
David J. Tracy
Paul F. D'Angelo
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.