Granted Patent
Utility
US 6,399,741 · App. 09/804,377
Color-stable polyalkyleneimine derivatives, fiberglass lubricants containing the same and processes for producing the same
Inventors:
Douglas Franklin Fry, Frank Norman Tuller
Patented Case
View Patent ↗
Granted: Jun 4, 2002
Filed: Mar 12, 2001
Inventors
Douglas Franklin Fry
Frank Norman Tuller
Assignee (at issue)
Cognis Corporation
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.