Patent US3869635A successfully refreshed from Google Patents.
US3869635A
Expired / Lapsed
US
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Rotary anode for an x-ray tube
Assignee: Siemens AG
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Filing: 1973-06-12
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Granted: 1975-03-04
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Expires: 1993-06-12
Abstract
Abstract A rotary anode of an X-ray tube delivers X-rays from at least the surface struck by electrons and consisting mostly of molybdenum. According to the present invention this surface consists to at least 90 percent of molybdenum and up to 10 percent hafnium.
Inventors
- 👤 Rudolf Friedel
- 👤 Karl Sedlatschek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:03
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J2235/00; H01J2235/08; H01J2235/083; H01J2235/084
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
27 words
A ROTARY ANODE FOR AN X-RAY TUBE HAVING A SURFACE STRUCK BY ELECTRONS AND PRODUCING X-RAYS, SAID SURFACE CONSISTING OF 95 PERCENT MOLYBDENUM AND 5 PERCENT HAFNIUM.
Claim 2
Dependent Claim
27 words
A ROTARY ANODE FOR AN X-RAY TUBE HAVING A SURFACE STRUCK BY ELECTRONS AND PRODUCING X-RAYS, SAID SURFACE CONSISTING OF 95 PERCENT MOLYBDENUM AND 5 PERCENT HAFNIUM.
Claim 3
Dependent Claim
54 words
A rotary anode for an X-ray tube having a surface struck by electrons and producing X-rays, said surface containing up to 10 percent hafmium and a balance of molybclemum comprising a body consisting of graphite covered with a diffusion delaying intermediate layer between said body and the said surface consisting of a molybdenum-hafnium alloy.
Claim 4
Dependent Claim
54 words
A rotary anode for an X-ray tube having a surface struck by electrons and producing X-rays, said surface containing up to 10 percent hafmium and a balance of molybclemum comprising a body consisting of graphite covered with a diffusion delaying intermediate layer between said body and the said surface consisting of a molybdenum-hafnium alloy.
Claim 5
Dependent Claim
54 words
A rotary anode for an X-ray tube having a surface struck by electrons and producing X-rays, said surface containing up to 10 percent hafmium and a balance of molybdemum comprising a body consisting of graphite covered with a diffusing delaying intermediate layer consisting of tantalum which is covered with a layer of molybdenum-hafnium alloy.
Claim 6
Dependent Claim
54 words
A rotary anode for an X-ray tube having a surface struck by electrons and producing X-rays, said surface containing up to 10 percent hafmium and a balance of molybdemum comprising a body consisting of graphite covered with a diffusing delaying intermediate layer consisting of tantalum which is covered with a layer of molybdenum-hafnium alloy.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |