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US4039879A
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US
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Electric tungsten/bromine cycle lamp and method of manufacturing said lamp
Assignee: US Philips Corp
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Filing: 1976-10-06
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Granted: 1977-08-02
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Expires: 1996-10-06
Abstract
Abstract Electric tungsten/bromine cycle lamps are provided according to the invention with 2,2-diamino-4,4,6,6-tetrabromo-2,2,4,4,6-hexahydrotriazaphosphine, 2-amino-2,4,4,6,6-pentabromo-2,2,4,4,6,6-hexahydrotriazaphosphine or mixtures thereof as a phosphorusbromine-hydrogen source. It has been found that these non-corrosive compounds present a very flexible possibility for dosaging the various types of lamps.
Inventors
- 👤 Germain Remi T'jampens
- 👤 Henricus Franciscus Johannes Giller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:23
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
41 words
An electric tungsten/bromine cycle lamp in which a tungsten filament is positioned in a light-pervious lamp vessel which contains an inert gas, bromine, hydrogen and phosphorus, characterized in that the envelope contains 2,2-diamino-4,4,6,6-tetrabromo-2,2,4,4,6,6-hexahydrotriazaphosphine, 2-amino-2,4,4,6,6-pentabromo-2,2,4,4,6,6-hexahydrotriazaphosphine, mixtures thereof or thermal decomposition products thereof.
Claim 2
Dependent Claim
41 words
An electric tungsten/bromine cycle lamp in which a tungsten filament is positioned in a light-pervious lamp vessel which contains an inert gas, bromine, hydrogen and phosphorus, characterized in that the envelope contains 2,2-diamino-4,4,6,6-tetrabromo-2,2,4,4,6,6-hexahydrotriazaphosphine, 2-amino-2,4,4,6,6-pentabromo-2,2,4,4,6,6-hexahydrotriazaphosphine, mixtures thereof or thermal decomposition products thereof.
Claim 3
Independent Claim
79 words
A method of manufacturing an electric tungsten/bromine cycle lamp having a tungsten filament in a light-pervious lamp vessel which contains an inert gas, bromine, hydrogen and phosphorus, characterized in that a solution of a substance selected from the group consisting of 2,2-diamino-4,4,6,6-tetrabromo-2,2,4,4,6,6-hexahydrotriazaphosphine, 2-amino-2,4,4,6,6-pentabromo-2,2,4,4,6,6-hexahydrotriazaphosphine and mixtures thereof is provided in the lamp vessel via an aperture in the wall of the lamp vessel, the solvent is evaporated, the lamp vessel is filled with an inert gas and is then sealed.
Claim 4
Independent Claim
79 words
A method of manufacturing an electric tungsten/bromine cycle lamp having a tungsten filament in a light-pervious lamp vessel which contains an inert gas, bromine, hydrogen and phosphorus, characterized in that a solution of a substance selected from the group consisting of 2,2-diamino-4,4,6,6-tetrabromo-2,2,4,4,6,6-hexahydrotriazaphosphine, 2-amino-2,4,4,6,6-pentabromo-2,2,4,4,6,6-hexahydrotriazaphosphine and mixtures thereof is provided in the lamp vessel via an aperture in the wall of the lamp vessel, the solvent is evaporated, the lamp vessel is filled with an inert gas and is then sealed.
References Cited (Backward Citations)
US3898500A
Cited
US3912961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |