Granted Patent
Utility
US 6,509,395 · App. 09/801,509
Defoamers for pigment dispersants
Inventors:
Kenneth Breindel, David W. Brown
Patented Case
View Patent ↗
Granted: Jan 21, 2003
Filed: Mar 8, 2001
Inventors
Kenneth Breindel
David W. Brown
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.