Patent US4256130A successfully refreshed from Google Patents.
Patent US3919124A successfully refreshed from Google Patents.
US3919124A
Expired / Lapsed
US
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X-ray tube anode
Assignee: Siemens AG
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Filing: 1973-01-15
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Granted: 1975-11-11
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Expires: 1993-01-15
Abstract
Abstract An X-ray tube anode consists of a difficultly meltable plate which carries a layer of black substance outside of the focal point path, specifically upon its under surface. The invention is particularly characterized in that the black substance of the layer consists of a heating product of a mixture which includes titanium dioxide and additions of at least one other oxide which melts with difficulty.
Inventors
- 👤 Rudolf Friedel
- 👤 Richard Lauterbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:21
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/105
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
55 words
AN ANODE FOR AN X-RAY TUBE, HAVING A ZONE AVAILABLE FOR ELECTRON BOMBARDMENT AND, DISTINCT FROM SAID ZONE, AN EXTERNAL LAYER OF BLACK MATERIAL COMPRISING THE REACTION PRODUCT OBTAINED BY HEATING A MIXTURE CONTAINING NOT LESS THAN 20 PERCENT OF TITANIUM DIOXIDE AND AT LEAST ONE OF THE REFRACTORY OXIDES, ALUMINUM OXIDE AND CALCIUM OXIDE.
Claim 2
Dependent Claim
55 words
AN ANODE FOR AN X-RAY TUBE, HAVING A ZONE AVAILABLE FOR ELECTRON BOMBARDMENT AND, DISTINCT FROM SAID ZONE, AN EXTERNAL LAYER OF BLACK MATERIAL COMPRISING THE REACTION PRODUCT OBTAINED BY HEATING A MIXTURE CONTAINING NOT LESS THAN 20 PERCENT OF TITANIUM DIOXIDE AND AT LEAST ONE OF THE REFRACTORY OXIDES, ALUMINUM OXIDE AND CALCIUM OXIDE.
Claim 3
Dependent Claim
20 words
An anode according to claim 1, wherein said mixture consists of 50 percent titanium dioxide and 50 percent aluminum oxide.
Claim 4
Dependent Claim
20 words
An anode according to claim 1, wherein said mixture consists of 32 percent titanium dioxide and 68 percent calcium oxide.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |