US4748368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three way gas discharge lamp
Assignee: Philips North America LLC
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Filing: 1984-12-27
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Granted: 1988-05-31
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Expires: 2004-12-27
Abstract
Abstract A three way lamp having two gas discharge light tubes mounted on the same housing in a light-transmitting bulb.
Inventors
- 👤 William E. Wilson
- 👤 Edward W. Morton
- 👤 Daniel W. O'Mullan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:55
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/32; H01J61/327; H01J61/70
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
68 words
A three-way lamp comprising a housing having first, second and third terminals arranged thereon as provided on a three-way incandescent lamp, said lamp including a light-transmitting bulb, and two gas discharge light tubes in said bulb, each tube having two electrodes, one tube having its electrodes separately connected to said first and third terminals, the other tube having its electrodes separately connected to said second and third terminals.
Claim 2
Dependent Claim
68 words
A three-way lamp comprising a housing having first, second and third terminals arranged thereon as provided on a three-way incandescent lamp, said lamp including a light-transmitting bulb, and two gas discharge light tubes in said bulb, each tube having two electrodes, one tube having its electrodes separately connected to said first and third terminals, the other tube having its electrodes separately connected to said second and third terminals.
Claim 3
Dependent Claim
15 words
A three-way lamp as claimed in claim 1, wherein each gas discharge tube is U-shaped.
Claim 4
Dependent Claim
20 words
A three-way lamp as claimed in claim 2, wherein one gas discharge tube is a larger U than the other.
Claim 5
Dependent Claim
26 words
A three-way lamp as claimed in claim 3, wherein said gas discharge tubes are orthogonally mounted in said bulb with the larger tube over the smaller.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |