Granted Patent
Utility
US 6,274,988 · App. 09/492,290
Open loop current control ballast low pressure mercury germicidal UV lamps
Inventor:
Pieter de Vries
Patented Case
View Patent ↗
Granted: Aug 14, 2001
Filed: Jan 27, 2000
Inventor
Pieter de Vries
Assignee (at issue)
R-Can Environmental 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.