US3697798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating x-ray target
Assignee: Schwarzkopf Technologies Corp
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Filing: 1971-03-24
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Granted: 1972-10-10
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Expires: 1991-03-24
Abstract
Abstract This invention relates to a rotating X-ray target made up of three metallic components, i.e., a molybdenum body, a focal track of an alloy of tungsten with one or more metal additives and a component present in the surface not exposed to electrons comprising tungsten alone or a tungsten alloy having a lesser amount of the additive metals.
Inventors
- 👤 Rudolf Machenschalk
- 👤 Herbert Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:51
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/108
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
16 words
A rotating X-ray target as in claim 1 in which the body is comprised of molybdenum.
Claim 2
Dependent Claim
19 words
A rotating X-ray target as in claim 1 in which the body is comprised of an alloy of molybdenum.
Claim 3
Dependent Claim
16 words
A rotating X-ray target as in claim 1 in which the body is comprised of graphite.
Claim 4
Dependent Claim
61 words
A rotating X-ray target as in claim 1 wherein the focal track comprises an alloy of tungsten with about from 1 to 25 percent by weight of rhenium with the remainder of said surface being comprised of a metal selected from the group consisting of tungsten and tungsten alloys with a lesser amount, up to 4 percent by weight, of rhenium.
Claim 5
Dependent Claim
49 words
A rotating X-ray target as in claim 1 in which the focal track comprises tungsten, from 1 to 25 percent by weight of rhenium and up to a total of 5 percent by weight of at least one metal selected from the group consisting of osmium, iridium and platinum.
Claim 6
Dependent Claim
27 words
A rotating anode as in claim 1 wherein the alloy in the focal track is an alloy of tungsten with about 10 percent by weight of rhenium.
Claim 7
Dependent Claim
110 words
A rotating X-ray target comprising a body and a surface layer, the body being comprised of a substance selected form the group consisting of molybdenum and alloys of molybdenum, the portion of the surface comprising a focal track being comprised of an alloy of tungsten with at least one metal alloying additive selected from the group consisting of rhenium, osmium, iridium, platinum, palladium, technetium, rhodium and ruthenium, and the remainder of the surface layer being comprised of a metal selected from the group consisting of tungsten and tungsten alloys in which the alloying additive metal is present in smaller amount by weight than in the alloy of the focal track.
Claim 8
Dependent Claim
22 words
An X-ray target as in claim 8 in which the metals anD alloys are present in the form of sintered metallic material.
Claim 9
Dependent Claim
24 words
An X-ray target as in claim 8 in which tungsten alloys are present in both the focal track and the surface layer adjacent thereto.
Claim 10
Dependent Claim
27 words
A rotating X-ray target as in claim 8 in which rhenium is alloyed with tungsten in both the focal track and said remainder of the surface area.
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |