US3993923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating for X-ray tube rotary anode surface remote from the electron target area
Assignee: US Philips Corp
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Filing: 1974-09-09
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Granted: 1976-11-23
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Expires: 1994-09-09
Abstract
Abstract A rotary anode for an X-ray tube in which the surface remote from the electron target area is covered with a metal oxide coating comprising at least 94 percent by weight Al 2 O 3 and at least 2 percent by weight TiO 2 .
Inventors
- 👤 Frederik Magendans
- 👤 Gerhardus Albertus TE Raa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:04
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/105
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
49 words
A rotary anode for an X-ray tube having an electron target area and a surface remote therefrom, comprising on the surface remote from the electron target area a metal oxide coating comprising at least 94 percent by weight aluminum oxide and at least 2 percent by weight titanium dioxide.
Claim 2
Dependent Claim
49 words
A rotary anode for an X-ray tube having an electron target area and a surface remote therefrom, comprising on the surface remote from the electron target area a metal oxide coating comprising at least 94 percent by weight aluminum oxide and at least 2 percent by weight titanium dioxide.
Claim 3
Dependent Claim
22 words
A rotary anode as defined in claim 1 wherein said metal oxide coating has a thickness of between 10 and 1000 micrometers.
Claim 4
Dependent Claim
21 words
A rotary anode as defined in claim 2 wherein the electron target area is a metal alloy consisting essentially of tungsten.
Claim 5
Dependent Claim
21 words
A rotary anode as defined in claim 2 wherein said metal oxide coating comprises approximately 97.5 percent by weight aluminum oxide.
Claim 6
Dependent Claim
55 words
A rotary anode as defined in claim 2 and further comprising a support plate of metal alloy consisting essentially of molybdenum supporting said metal oxide coating on one side thereof and covering the other side thereof a metal alloy coating for use as an electron target area, said metal alloy coating consisting essentially of tungsten.
Claim 7
Dependent Claim
21 words
A rotary anode as defined in claim 5 wherein said metal oxide coating consists essentially of aluminum oxide and titanium dioxide.
Claim 8
Dependent Claim
22 words
A rotary anode as defined in claim 5 wherein said metal oxide coating has a thickness of between 20 and 100 micrometers.
Claim 9
Dependent Claim
21 words
A rotary anode as defined in claim 7 wherein said metal oxide coating consists essentially of aluminum oxide and titanium dioxide.
Claim 10
Dependent Claim
21 words
A rotary anode as defined in claim 1 wherein said metal oxide coating has a thickness between 20 and 100 micrometers.
Claim 11
Dependent Claim
21 words
A rotary anode as defined in claim 9 wherein said metal oxide coating consists essentially of aluminum oxide and titanium dioxide.
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) | 1979-11-23 | 1980-05-24 | 1980-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-23 | 1984-05-24 | 1984-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-23 | 1988-05-24 | 1988-11-23 | $7700.00 | Window Closed / Lapsed |