US3619701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogen cycle incandescent lamps
Assignee: Toshiba Corp
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Filing: 1969-12-23
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Granted: 1971-11-09
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Expires: 1989-12-23
Abstract
Abstract A halogen lamp exhibiting a good regenerative halogen cycle is sealed with an inert or nitrogen gas, chlorine and fluorine, preferably, in the form of a hydrocarbon halide. Quantities of chlorine and fluorine are respectively from 0.05 X 10 6 to 1.00 X 10 6 gram atoms of chlorine and from 0.05 X 10 6 to 1.50 X 10 6 gram atoms of fluorine per cubic centimeter of the inner volume of the lamp.
Inventors
- 👤 Keiichi Sugano
- 👤 Takashi Ohmori
- 👤 Yoji Yuge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:43
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/50; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
14 words
A halogen lamp according to claim 1 wherein said second gas further contains carbon.
Claim 2
Dependent Claim
19 words
A halogen lamp according to claim 1 wherein said second gas is a hydrocarbon halide containing chlorine and fluorine.
Claim 3
Dependent Claim
21 words
A halogen lamp according to claim 3 wherein said second gas is selected from the group consisting of monochlorodifluoromethane and dichlorotetrafluoroethane.
Claim 4
Dependent Claim
25 words
A halogen lamp according to claim 3 wherein said hydrocarbon halide further contains hydrogen, the molar ratio of halogen to hydrogen being 4:1 to 5:1.
Claim 5
Dependent Claim
13 words
A halogen lamp according to claim 5 wherein said hydrocarbon halide is monochlorodifluoromethane.
Claim 6
Dependent Claim
115 words
A halogen lamp comprising a transparent bulb, a tungsten coil filament mounted in said bulb, a pair of conductive foils sealed in the opposite ends of said bulb, a pair of condUctors interconnecting opposite ends of said filament and said foils, outer terminal pins respectively connected to said foils and extending outwardly through the ends of said bulb, argon gas and a gas mixture containing chlorine and fluorine, the quantities of said chlorine and fluorine being from 0.05 X 10 6 to 1.00 X 10 6 gram atoms of chlorine and from 0.05 X 10 6 to 1.50 X 10 6 gram atoms of fluorine per cubic centimeter of the inner volume of said bulb.
Claim 7
Dependent Claim
35 words
A halogen lamp according to claim 7 wherein said filament is mounted along the longitudinal axis of said bulb and supported by a plurality of spaced-apart anchors at a plurality of points along said filaments.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |