Granted Patent
Utility
US 6,583,185 · App. 10/096,259
Defoamers for aqueous systems
Inventors:
Michael S. Wiggins, Ronald W. Broadbent
Patented Case
View Patent ↗
Granted: Jun 24, 2003
Filed: Mar 12, 2002
Inventors
Michael S. Wiggins
Ronald W. Broadbent
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.