US4367432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blended lamp
Assignee: US Philips Corp
•
Filing: 1980-02-27
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Granted: 1983-01-04
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Expires: 2000-02-27
Abstract
Abstract In a blended lamp, an incandescent filament and a high-pressure discharge tube are arranged electrically in series. The filament forms part of a halogen incandescent lamp and the discharge tube contains a sodium amalgam which is very high in mercury. A relatively high lumen per Watt-value is thereby combined with an acceptable color of the light.
Inventors
- 👤 Alfred E. T. Glenny
- 👤 Johannes A. J. M. van Vliet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:58
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/96; H01J61/02; H01J61/12; H01J61/18; H01J61/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
68 words
A blended lamp having an incandescent filament in a halogen atmosphere which is electrically arranged in series with a high-pressure sodium vapor discharge tube, the discharge tube containing mercury and a starting gas in addition to sodium, the percentage by weight "G" of the mercury in the discharge tube being between 91 and 98% of the combined weight of the mercury and the sodium in the discharge tube.
Claim 2
Dependent Claim
68 words
A blended lamp having an incandescent filament in a halogen atmosphere which is electrically arranged in series with a high-pressure sodium vapor discharge tube, the discharge tube containing mercury and a starting gas in addition to sodium, the percentage by weight "G" of the mercury in the discharge tube being between 91 and 98% of the combined weight of the mercury and the sodium in the discharge tube.
Claim 3
Dependent Claim
14 words
A blended lamp as claimed in claim 1, characterized in that G is 95%±0.5%.
References Cited (Backward Citations)
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |