US4516255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating anode for X-ray tubes
Assignee: Schwarzkopf Technologies Corp
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Filing: 1983-02-11
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Granted: 1985-05-07
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Expires: 2003-02-11
Abstract
Abstract There is disclosed a rotating anode for use in X-ray tubes having a basic member made of a carbonaceous molybdenum alloy, such as TZM, and a focal path, that is a cathode path, of tungsten or a tungsten alloy, the surface of the basic member outside the focal path being coated at least partially with one or more oxides or a mixture of one or more metals and one or more oxides and having a 10 to 200 μm thick layer of molybdenum and/or tungsten disposed between the surface of the basic member and the coating thereon of oxides or mixture of metal and oxides.
Inventors
- 👤 Helmut Petter
- 👤 Hubert Bildstein
- 👤 Fritz Simader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:23
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/105
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
A rotating anode for x-ray tubes comprising: a basic member comprised of a carbonaceous molybdenum alloy; a focal path member comprised of tungsten or a tungsten alloy; a coating layer disposed on at least part of said basic member comprised of at least one oxide, or of a mixture of at least one oxide and at least one metal; and an intermediate layer comprised of molybdenum, tungsten, or a mixture thereof, disposed between said basic member and said coating layer and being from 10 to 200 μm thick.
Claim 2
Dependent Claim
88 words
A rotating anode for x-ray tubes comprising: a basic member comprised of a carbonaceous molybdenum alloy; a focal path member comprised of tungsten or a tungsten alloy; a coating layer disposed on at least part of said basic member comprised of at least one oxide, or of a mixture of at least one oxide and at least one metal; and an intermediate layer comprised of molybdenum, tungsten, or a mixture thereof, disposed between said basic member and said coating layer and being from 10 to 200 μm thick.
Claim 3
Dependent Claim
43 words
A rotating anode according to claim 1 wherein the basic member is made of molybdenum alloy containing about 0.5% to 1.5% by weight of Titanium, about 0.5% by weight of Zirconium and optionally about 0.3% by weight of carbon, the remainder being molybdenum.
Claim 4
Dependent Claim
17 words
A rotating anode according to claim 1 wherein the coating layer is comprised of TiO 2 .
Claim 5
Dependent Claim
16 words
A rotating anode according to claim 1 wherein the intermediate layer is a layer of molybdenum.
Claim 6
Dependent Claim
16 words
A rotating anode according to claim 1 wherein the intermediate layer is a layer of tungsten.
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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) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |