Electric lamp and discharge devices – Incandescent lamps
Reexamination Certificate
2006-05-17
2009-06-02
Geyer, Scott B. (Department: 4113)
Electric lamp and discharge devices
Incandescent lamps
Reexamination Certificate
active
07541726
ABSTRACT:
A base-up incandescent lamp (10) includes a coiled-coil filament (14) that has a primary wire (18) and a secondary wire (16), the primary wire (18) comprising an overwind that overlies the secondary wire (16) and provides a lower filament temperature and, therefore, less filament sag and a concomitant longer lamp life.
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patent: 2004/0070324 (2004-04-01), Lisitsyn
Brett et al, Filaments for Incandescent Lamps with Energy Conserving Envelopes , Mar. 1981, IEEE Transactions on Industry Applications, vol. IA-17, Issue 2, pp. 210-216.
Fleming Raymond T.
Kasak Alexander N.
Laird Richard C.
Lenef Alan L.
Li Jason J.
Bessone Carlo S.
Coughlin Andrew J
Geyer Scott B.
Osram Sylvania Inc.
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