Granted Patent
Utility
US 4,620,934 · App. 06/733,568
Soluble fluorinated cycloalkane sulfonate surfactant additives for NH.sub.4
Inventors:
Ronald J. Hopkins, Evan G. Thomas, Harold John Kieta
Patented Case
View Patent ↗
Granted: Nov 4, 1986
Filed: May 13, 1985
Inventors
Ronald J. Hopkins
Evan G. Thomas
Harold John Kieta
Assignee (at issue)
ALLIED CONSULTING, 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.