US4195891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali metal vapor generator
Assignee: SAES Getters SpA
•
Filing: 1978-03-10
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Granted: 1980-04-01
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Expires: 1998-03-10
Abstract
Abstract For the introduction of an alkali metal vapor into an electron discharge lamp or an electron discharge tube, in particular for the vapor deposition of surfaces for photo-emission or secondary electron emission in such a tube, generators are used with a filling which comprises at least one alkali metal as a compound with either boron or silicon. Such filling can be mixed with additional metals.
Inventors
- 👤 Stephen J. Hellier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:34
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/243; C22; C22B; C22B26/00; C22B26/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
55 words
An alkali metal vapour generator comprising a holder and a material carried by the holder, said material being of the formula AM x , wherein A is selected from the group consisting of sodium, potassium and caesium, M is selected from the group consisting of boron and silicon, and x is from 1 to 40.
Claim 2
Dependent Claim
55 words
An alkali metal vapour generator comprising a holder and a material carried by the holder, said material being of the formula AM x , wherein A is selected from the group consisting of sodium, potassium and caesium, M is selected from the group consisting of boron and silicon, and x is from 1 to 40.
Claim 3
Dependent Claim
20 words
An alkali metal vapour generator of claim 1 comprising a holder and K 6-8 Si 46 carried by the holder.
Claim 4
Dependent Claim
18 words
An alkali metal vapour generator of claim 1 comprising a holder and NaB 6 carried by the holder.
Claim 5
Dependent Claim
18 words
An alkali metal vapour generator of claim 1 comprising a holder and KB 6 carried by the holder.
Claim 6
Dependent Claim
28 words
An alkali metal vapour generator of claim 1 comprising a holder and a Cs-B composition where the atomic ratio of caesium to boron is from 1:20 to 1:40.
Claim 7
Dependent Claim
25 words
An alkali metal vapour generator of claim 1 comprising a holder and a Cs-B composition where the atomic ratio of caesium to boron is 1:32.
Claim 8
Dependent Claim
81 words
An alkali metal vapour generator comprising a holder and a material carried by the holder, said material being of the formula AM x , wherein A is selected from the group consisting of sodium potassium and caesium, M is selected from the group consisting of boron and silicon, and x is from 1 to 40 and wherein said material is in admixture with a metal binder which is selected from the group consisting of nickel, zirconium, niobium, aluminium, and alloys thereof.
Claim 9
Dependent Claim
81 words
An alkali metal vapour generator comprising a holder and a material carried by the holder, said material being of the formula AM x , wherein A is selected from the group consisting of sodium potassium and caesium, M is selected from the group consisting of boron and silicon, and x is from 1 to 40 and wherein said material is in admixture with a metal binder which is selected from the group consisting of nickel, zirconium, niobium, aluminium, and alloys thereof.
Claim 10
Dependent Claim
28 words
An alkali metal vapour generator of claim 7 comprising a holder containing a material consisting essentially of NaB 6 and an alloy of 84% zirconium with 16% aluminium.
Claim 11
Dependent Claim
12 words
An evacuated vessel containing an alkali metal vapour generator of claim 7.
Claim 12
Dependent Claim
80 words
A process for introducing an alkali metal vapour into an electron discharge tube comprising the steps of: I. inserting into the electron discharge tube a holder containing a material, said material being of the formula AM x , wherein A is selected from the group consisting of sodium, potassium and caesium, M is selected from the group consisting of boron and silicon, and x is from 1 to 40 and then II. heating the material to liberate alkali metal vapour.
Claim 13
Dependent Claim
80 words
A process for introducing an alkali metal vapour into an electron discharge tube comprising the steps of: I. inserting into the electron discharge tube a holder containing a material, said material being of the formula AM x , wherein A is selected from the group consisting of sodium, potassium and caesium, M is selected from the group consisting of boron and silicon, and x is from 1 to 40 and then II. heating the material to liberate alkali metal vapour.
References Cited (Backward Citations)
US3667513A
Cited
US3945949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |