Granted Patent
Utility
US 5,757,137 · App. 08/850,365
High pressure sodium lamp with bimetallic starting aid and ignition wire
Inventor:
Huiling Zhu
Patented Case
View Patent ↗
Granted: May 26, 1998
Filed: May 2, 1997
Inventor
Huiling Zhu
Assignee (at issue)
OSRAM SYLVANIA 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.