US4876705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray tube with a molybdenum target
Assignee: General Electric CGR SA
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Filing: 1988-11-10
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Granted: 1989-10-24
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Expires: 2008-11-10
Abstract
Abstract An X-ray tube, the anode of which has a molybdenum target, is disclosed. In odrer to prevent cracks from forming in the target under the effect of electron bombardment, the molybedenum is alloyed with vanadium.
Inventors
- 👤 Jacques Delair
- 👤 Olivier Peyret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:27
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
58 words
An X-ray tube comprising an anode and a cathode, with the cathode delivering an electron beam and the anode comprising a target impinged by the electron beam on a surface forming the source of an X-radiation, said target being made of molybdenum, wherein the molybdenum is alloyed with vanadium in a proportion, by weight, of at least 0.5%.
Claim 2
Dependent Claim
58 words
An X-ray tube comprising an anode and a cathode, with the cathode delivering an electron beam and the anode comprising a target impinged by the electron beam on a surface forming the source of an X-radiation, said target being made of molybdenum, wherein the molybdenum is alloyed with vanadium in a proportion, by weight, of at least 0.5%.
Claim 3
Dependent Claim
23 words
An X-ray tube according to claim 1, wherein the vanadium is alloyed with molybdenum in a proportion, by weight, of 2.5 to 3.5%.
Claim 4
Dependent Claim
34 words
An X-ray tube according to claim 1 or 2, wherein the target is formed directly by the anode, said anode being made by the sintering of a molybdenum powder with which vanadium is mixed.
Claim 5
Dependent Claim
28 words
An X-ray tube according to claim 1 or 2, wherein the anode comprises a basic body on which the target is deposited in the form of a layer.
Claim 6
Dependent Claim
25 words
An X-ray tube according to claim 4, wherein the deposition of the layer forming the target is achieved by a vapor phase chemical deposition method.
Claim 7
Dependent Claim
14 words
An X-ray tube according to claim 5, wherein the anode is a rotating anode.
Claim 8
Dependent Claim
22 words
An X-ray tube according to claim 6, said tube constituting the X-ray tube of an apparatus for X-ray examinations of the breast.
References Cited (Backward Citations)
US3869635A
Cited
FR2349953A1
Cited
US4271372A
Cited
US4131718A
Cited
FR2500958A1
Cited
JPS60250546A
Cited
US4641334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |