Patent US4600659A successfully refreshed from Google Patents.
US4600659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emissive coating on alloy x-ray tube target
Assignee: General Electric Co
•
Filing: 1984-08-24
•
Granted: 1986-07-15
•
Expires: 2004-08-24
Abstract
Abstract An x-ray tube target composed of a molybdenum alloy material such as TZM is coated with a mixture containing from 40 percent to 70 percent of TiO 2 with the remaining material being a stabilized oxide. The coating is then fused to a smooth, glossy condition to provide an enhanced thermal-emittance surface that adheres well to the target substrate.
Inventors
- 👤 Jauwhei Hong
- 👤 Richard A. Jens
- 👤 Steve S. Shen
- 👤 Earle L. Manson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:33
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/105
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
96 words
A thermal-emissive coating material on an anode target of an x-ray tube of the type having a cathode for directing the flow of electrons to a focal track portion of the anode target to produce x-rays said coating material comprising a fused application of a mixture comprising from 40 percent to 70 percent by weight of TiO 2 with the remaining portion of the mixture being a stabilized oxide primarily selected from the group consisting of ZrO 2 , HfO, MgO, CeO 2 , La 2 O 2 , and SrO, and also containing stabilizing material.
Claim 2
Dependent Claim
96 words
A thermal-emissive coating material on an anode target of an x-ray tube of the type having a cathode for directing the flow of electrons to a focal track portion of the anode target to produce x-rays said coating material comprising a fused application of a mixture comprising from 40 percent to 70 percent by weight of TiO 2 with the remaining portion of the mixture being a stabilized oxide primarily selected from the group consisting of ZrO 2 , HfO, MgO, CeO 2 , La 2 O 2 , and SrO, and also containing stabilizing material.
Claim 3
Dependent Claim
17 words
A thermal-emissive coating material set forth in claim 1 wherein said stabilized oxide is ZrO 2 .
Claim 4
Dependent Claim
44 words
A thermal-emittance coating material as set forth in claim 2 wherein said, stabilized oxide comprises ZrO 2 in the amount of 86 to 96 percent by weight and said stabilizing material comprises CaO in the amount of 4 percent to 14 percent by weight.
Claim 5
Dependent Claim
79 words
A coating applied to a surface of an x-ray tube target for enhancing the thermal-emittance characteristics thereof comprising an applied mixture of TiO 2 in an amount of 40 percent to 70 percent by weight and a stabilized oxide in an amount of 30 to 60 percent by weight, said oxide being primarily selected from the group consisting of ZrO 2 , HfO, MgO, CeO 2 , La 2 O 3 , and SrO, and also containing stabilizing material.
Claim 6
Dependent Claim
79 words
A coating applied to a surface of an x-ray tube target for enhancing the thermal-emittance characteristics thereof comprising an applied mixture of TiO 2 in an amount of 40 percent to 70 percent by weight and a stabilized oxide in an amount of 30 to 60 percent by weight, said oxide being primarily selected from the group consisting of ZrO 2 , HfO, MgO, CeO 2 , La 2 O 3 , and SrO, and also containing stabilizing material.
Claim 7
Dependent Claim
17 words
A coating as set forth in claim 4 wherein ZrO 2 is used as the oxide material.
Claim 8
Dependent Claim
35 words
A coating as set forth in claim 5 wherein said stabilized oxide comprises 86 to 96 percent by weight of ZrO 2 and said stabilizing material comprises 4 to 14 percent by weight of CaO.
Claim 9
Dependent Claim
99 words
A thermal-emissive coating material on an anode target of an x-ray tube of the type having a cathode for directing the flow of electrons to a focal track portion of the anode target to produce x-rays, said coating comprising the product resulting from fusing a mixture comprising from 40 percent to 70 percent by weight of TiO 2 and from 30 percent to 60 percent by weight of a stabilized oxide being primarily selected from the group consisting of ZrO 2 , HfO, MgO, CeO 2 , La 2 O 3 , and SrO, and also containing stabilizing material.
Claim 10
Dependent Claim
99 words
A thermal-emissive coating material on an anode target of an x-ray tube of the type having a cathode for directing the flow of electrons to a focal track portion of the anode target to produce x-rays, said coating comprising the product resulting from fusing a mixture comprising from 40 percent to 70 percent by weight of TiO 2 and from 30 percent to 60 percent by weight of a stabilized oxide being primarily selected from the group consisting of ZrO 2 , HfO, MgO, CeO 2 , La 2 O 3 , and SrO, and also containing stabilizing material.
Claim 11
Dependent Claim
43 words
The thermal-emissive coating material as set forth in claim 7 wherein said stabilized oxide comprises ZrO 2 in the amount of 86 to 96 percent by weight and said stabilizing material comprises CaO in the amount of 4 to 14 percent by weight.
Claim 12
Independent Claim
87 words
A method of applying a thermal-emissive coating to an anode target comprising the steps of: applying to a surface of the target a coating mixture comprising from 40 percent to 70 percent by weight of TiO 2 and from 30 to 60 percent by weight of a stabilized oxide, and heating the target in a vacuum of at least 10 -5 Torr to a temperature in the range of 1620° to 1700° C. for sufficient time to cause said coating to fuse to a smooth, glossy surface.
Claim 13
Independent Claim
87 words
A method of applying a thermal-emissive coating to an anode target comprising the steps of: applying to a surface of the target a coating mixture comprising from 40 percent to 70 percent by weight of TiO 2 and from 30 to 60 percent by weight of a stabilized oxide, and heating the target in a vacuum of at least 10 -5 Torr to a temperature in the range of 1620° to 1700° C. for sufficient time to cause said coating to fuse to a smooth, glossy surface.
Claim 14
Dependent Claim
69 words
A coating applied to a surface of an x-ray tube target for enhancing the thermal-emittance characteristics thereof comprising an applied mixture of TiO 2 in an amount of 40 percent to 70 percent by weight and stabilized ZrO 2 in an amount of 30 percent to 60 percent by weight which applied mixture has been heated to a fused condition to provide a smooth, glossy surface of the target.
Claim 15
Dependent Claim
69 words
A coating applied to a surface of an x-ray tube target for enhancing the thermal-emittance characteristics thereof comprising an applied mixture of TiO 2 in an amount of 40 percent to 70 percent by weight and stabilized ZrO 2 in an amount of 30 percent to 60 percent by weight which applied mixture has been heated to a fused condition to provide a smooth, glossy surface of the target.
Claim 16
Dependent Claim
42 words
A coating as set forth in claim 10 wherein said stabilized ZrO 2 comprises ZrO 2 in an amount of 86 to 96 percent by weight and a stabilizing material comprising CaO in an amount of 4 to 14 percent by weight.
References Cited (Backward Citations)
US4132916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |