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US4131718A
Expired / Lapsed
US
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Rotating anode for x-ray tube
Assignee: Eurotungstene SA
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Filing: 1978-02-15
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Granted: 1978-12-26
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Expires: 1998-02-15
Abstract
Abstract A rotating anode for an x-ray tube, comprising a body of sintered, molybdenum-based alloy coated with a layer of tungsten or tungsten alloy at least in the zone of impact of the electrons. The molybdenum-based alloy contains from 3 to 10% by weight of tungsten and 0.01 to 0.5% of ZrO 2 . The anode has improved resistance to thermal stresses.
Inventors
- 👤 Bruno Childeric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:25
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/108; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12146; Y10T428/12229; Y10T428/12271; Y10T428/12278
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
52 words
A rotating anode for an x-ray tube, comprising a body of sintered, molybdenum-based alloy coated with a layer of tungsten or tungsten alloy at least in the zone of impact of the electrons, wherein the coated molybdenum-based alloy contains by weight 3 to 10% of tungsten and 0.01 to 0.5% of zirconia.
Claim 2
Dependent Claim
52 words
A rotating anode for an x-ray tube, comprising a body of sintered, molybdenum-based alloy coated with a layer of tungsten or tungsten alloy at least in the zone of impact of the electrons, wherein the coated molybdenum-based alloy contains by weight 3 to 10% of tungsten and 0.01 to 0.5% of zirconia.
Claim 3
Dependent Claim
23 words
A rotating anode as defined in claim 1, wherein the percentages by weight of the tungsten and zirconia are 5.5% and 0.4% respectively.
References Cited (Backward Citations)
GB1121407A
Cited
US3869634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |