US4559471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device provided with a evacuated bulb comprising a getter and a getter auxiliary means
Assignee: US Philips Corp
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Filing: 1983-03-25
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Granted: 1985-12-17
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Expires: 2003-03-25
Abstract
Abstract In devices provided with an evacuated bulb in which is present an activated metallic getter, hydrocarbons can be released or produced. As a result, the gas pressure and the heat conductivity increase. In devices according to the invention, for example, low-pressure sodium vapour discharge lamps, solar collectors, display tubes and image intensifiers, a getter auxiliary means is provided. The auxiliary means comprises an inorganic porous carrier charged with a transition metal having an atomic number from the series 23 to 29, 41 to 47 and 73 to 79, in elementary form or in oxide form, or with a combination of at least two of the said materials.
Inventors
- 👤 Wiggert Kroontje
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:53
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/24; H01J61/26; F; F24; F24S; F24S10/00; F24S10/40; F24S10/45; F24S40/00; F24S40/40; F24S40/46; F24S80/00; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
68 words
A device provided with an evacuated bulb in which bulb there are present as activated metallic getter and an auxiliary means for the getter, characterized in that the auxiliary means is capable of disintegrating methane at a temperature of 350° C. and comprises an inorganic porous carrier charged with at least one transition metallic material selected from the group consisting of rhodium, copper, platinum, palladium and oxides thereof.
Claim 2
Independent Claim
68 words
A device provided with an evacuated bulb in which bulb there are present as activated metallic getter and an auxiliary means for the getter, characterized in that the auxiliary means is capable of disintegrating methane at a temperature of 350° C. and comprises an inorganic porous carrier charged with at least one transition metallic material selected from the group consisting of rhodium, copper, platinum, palladium and oxides thereof.
Claim 3
Dependent Claim
22 words
The device of claim 1 wherein the carrier is charged with a combination of at least two of said transition metal materials.
Claim 4
Dependent Claim
27 words
The device of claim 1 wherein the auxiliary means is charged with platinum plus an oxide selected from the group consisting of palladium oxide and rhodium oxide.
Claim 5
Dependent Claim
17 words
A device as claimed in claim 1 wherein the device is a low-pressure sodium vapour discharge lamp.
Claim 6
Dependent Claim
14 words
A device as claimed in claim 1 wherein the device is a solar collector.
Claim 7
Independent Claim
87 words
A device provided with an evacuated bulb in which bulb there are present an activated metallic getter and an auxiliary means for said getter characterized in that said auxiliary means for said getter is spaced apart from said getter, is capable of disintegrating methane at a temperature of 350° C. and comprises an inorganic porous carrier impregnated with at least one transition metal material selected from the group of elements of atomic numbers 23 to 29, 41 to 47 and 73 to 79 inclusive and oxides thereof.
Claim 8
Independent Claim
87 words
A device provided with an evacuated bulb in which bulb there are present an activated metallic getter and an auxiliary means for said getter characterized in that said auxiliary means for said getter is spaced apart from said getter, is capable of disintegrating methane at a temperature of 350° C. and comprises an inorganic porous carrier impregnated with at least one transition metal material selected from the group of elements of atomic numbers 23 to 29, 41 to 47 and 73 to 79 inclusive and oxides thereof.
Claim 9
Dependent Claim
35 words
The device of claim 6 wherein the transition metal material is selected from the group consisting of Fe, Cr, Ni, Cu, Co, Pd, Mn, Ag, Re, W, Pt, Rh, Ir, and Ru and mixtures thereof.
References Cited (Backward Citations)
US3926832A
Cited
US3926832B1
Cited
US3896042A
Cited
US4305017A
Cited
US4405487A
Cited
US4440737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |