External grid-controlled hot cathode array electron gun
US-10818464-B2 · Oct 27, 2020 · US
Tungsten-containing material and direct current discharge lamp electrode
US12460281B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12460281-B2 |
| Application number | US-202318854332-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 11, 2023 |
| Priority date | Apr 15, 2022 |
| Publication date | Nov 4, 2025 |
| Grant date | Nov 4, 2025 |
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Abstract
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A tungsten-containing material that has an oxygen generation quantity of more than 1 ppm and 20 ppm or less at 2100° C. to 2300° C. as detected by oxygen analysis based on an oxygen separation method, and contains 5 ppm or more and 30 ppm or less of potassium.
First claim
Opening claim text (preview).
The invention claimed is: 1 . A tungsten-containing material that has an oxygen generation quantity of more than 1 ppm and 20 ppm or less at 2100° C. to 2300° C. as detected by oxygen analysis based on an oxygen separation method, and contains 5 ppm or more and 30 ppm or less of potassium. 2 . The tungsten-containing material according to claim 1 , having a crystal grain size of 200 μm or less. 3 . The tungsten-containing material acco…
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Electricity · mapped topic
Electricity · mapped topic
- H01J61/06Primary
Electricity · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US12460281B2 cover?
- A tungsten-containing material that has an oxygen generation quantity of more than 1 ppm and 20 ppm or less at 2100° C. to 2300° C. as detected by oxygen analysis based on an oxygen separation method, and contains 5 ppm or more and 30 ppm or less of potassium.
- Who is the assignee on this patent?
- Almt Corp
- What technology area does this patent fall under?
- Primary CPC classification H01J61/06. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 04 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).