Granted Patent
Utility
US 6,641,986 · App. 10/218,068
Acetylenic diol surfactant solutions and methods of using same
Inventors:
Peng Zhang, Danielle Megan King, Eugene Joseph Karwacki, Jr., Leslie Barber
Patented Case
View Patent ↗
Granted: Nov 4, 2003
Filed: Aug 12, 2002
Inventors
Peng Zhang
Danielle Megan King
Eugene Joseph Karwacki, Jr.
Leslie Barber
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.