Granted Patent
Utility
US 6,077,440 · App. 09/109,276
Inhibition of silica and silicate deposition
Inventors:
Donald Carroll Roe, Bradley J. Utzka
Patented Case
View Patent ↗
Granted: Jun 20, 2000
Filed: Jun 30, 1998
Inventors
Donald Carroll Roe
Bradley J. Utzka
Assignee (at issue)
Betzdearborn, 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.