US3883370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical barrier layer coating and method for making same
Assignee: Individual
•
Filing: 1972-08-11
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Granted: 1975-05-13
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Expires: 1992-08-11
Abstract
Abstract Magnetic metal inductors are provided with electrical barrier layers made by forming an adherent oxide layer on the surface of the inductor, treating the oxide layer with at least one Group III metal, and then oxidizing the Group III metal. The electrical barrier layers are electrically insulative or dielectric. The layers can withstand high temperatures without deterioration and are corrosion resistant.
Inventors
- 👤 Jerome J Kanter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:30
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/14766; H01F1/14775; H01F1/14783; C; C23; C23C; C23C22/00; C23C22/78
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
135 words
IN A PROCESS FOR PROVIDING AN ELECTRICAL BARRIER LAYER ON MAGNETIC INDUCTORS HAVING AN ADHERENT OXIDE LAYER FORMED ON A SURFACE THEREOF, THE STEPS COMPRISING: COMPLEXING SAID OXIDE LAYER OF THE MAGNETIC INDUCTOR WITH AT LEAST ONE METAL IN SOLID PHASE FROM GROUP III OF THE PERIODIC TABLE BY MECHANICAL FRICTIONAL CONTACT THEREBETWEEN IN ORDER TO COMPLEX SAID GROUP III METAL WITH SAID OXIDE LAYER; SAID GROUP III METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, SCANDIUM, YTTRIUM, AND THE RARE EARTH METALS; SAID OXIDE LAYER FORMED BY OXIDATION OF SAID MAGNETIC INDUCTOR METAL; SAID MAGNETIC INDUCTOR COMPRISING AT LEAST ONE METAL FROM THE SPINEL MINERAL GROUP SELECTED FROM THE CLASS CONSISTING OF IRON, CHROMIUM, MANGANESE, AND THE ALLOYS THEREOF; AND OXIDIZING AT LEAST A PORTION OF SAID GROUP III METAL CONTAINED IN SAID LAYER.
Claim 2
Dependent Claim
135 words
IN A PROCESS FOR PROVIDING AN ELECTRICAL BARRIER LAYER ON MAGNETIC INDUCTORS HAVING AN ADHERENT OXIDE LAYER FORMED ON A SURFACE THEREOF, THE STEPS COMPRISING: COMPLEXING SAID OXIDE LAYER OF THE MAGNETIC INDUCTOR WITH AT LEAST ONE METAL IN SOLID PHASE FROM GROUP III OF THE PERIODIC TABLE BY MECHANICAL FRICTIONAL CONTACT THEREBETWEEN IN ORDER TO COMPLEX SAID GROUP III METAL WITH SAID OXIDE LAYER; SAID GROUP III METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, SCANDIUM, YTTRIUM, AND THE RARE EARTH METALS; SAID OXIDE LAYER FORMED BY OXIDATION OF SAID MAGNETIC INDUCTOR METAL; SAID MAGNETIC INDUCTOR COMPRISING AT LEAST ONE METAL FROM THE SPINEL MINERAL GROUP SELECTED FROM THE CLASS CONSISTING OF IRON, CHROMIUM, MANGANESE, AND THE ALLOYS THEREOF; AND OXIDIZING AT LEAST A PORTION OF SAID GROUP III METAL CONTAINED IN SAID LAYER.
Claim 3
Dependent Claim
16 words
A process according to claim 1 in which said magnetic inductor comprises a ferrous base metal.
Claim 4
Dependent Claim
14 words
A process according to claim 1 in which said magnetic inductor comprises carbon steel.
Claim 5
Dependent Claim
14 words
A process according to claim 1 in which said Group III metal comprises aluminum.
Claim 6
Dependent Claim
19 words
A magnetic inductor metal provided with the electrical barrier layer produced in accordance with the process of claim 4.
Claim 7
Dependent Claim
19 words
A process according to claim 1 in which said Group III metal comprises at least one rare earth metal.
Claim 8
Dependent Claim
19 words
A magnetic inductor metal provided with the electrical barrier layer produced in accordance with the process of claim 6.
Claim 9
Dependent Claim
14 words
A process according to claim 1 in which said Group III metal comprises yttrium.
Claim 10
Dependent Claim
19 words
A magnetic inductor metal provided with the electrical barrier layer produced in accordance with the process of claim 8.
Claim 11
Dependent Claim
14 words
A process according to claim 1 in which said magnetic inductor comprises silicon steel.
Claim 12
Dependent Claim
19 words
A magnetic inductor metal provided with the electrical barrier layer produced in accordance with the process of claim 10.
Claim 13
Dependent Claim
132 words
In a process for providing an electrical barrier layer on magnetic inductor, the steps comprising: forming tightly adherent oxide layer on a surface of a magnetic inductor by oxidation of the magnetic inductor metal; said magnetic inductor comprising at least one metal from the metals in the spinel mineral group selected from the class consisting of iron, chromium, manganese, and the alloys thereof; complexing said oxide layer with at least one metal in solid form from Group III of the Periodic Table in sufficient amounts of mechanical frictional contact in order to form an electrical barrier layer thereon, and said Group III metal selected from the class consisting of aluminum, scandium, yttrium, and the rare earth metals, and oxidizing at least a portion of the Group III metal contained in said layer.
Claim 14
Dependent Claim
132 words
In a process for providing an electrical barrier layer on magnetic inductor, the steps comprising: forming tightly adherent oxide layer on a surface of a magnetic inductor by oxidation of the magnetic inductor metal; said magnetic inductor comprising at least one metal from the metals in the spinel mineral group selected from the class consisting of iron, chromium, manganese, and the alloys thereof; complexing said oxide layer with at least one metal in solid form from Group III of the Periodic Table in sufficient amounts of mechanical frictional contact in order to form an electrical barrier layer thereon, and said Group III metal selected from the class consisting of aluminum, scandium, yttrium, and the rare earth metals, and oxidizing at least a portion of the Group III metal contained in said layer.
Claim 15
Dependent Claim
14 words
A process according to claim 12 in which said Group III metal comprises aluminum.
Claim 16
Dependent Claim
14 words
A process according to claim 12 in which said Group III metal comprises yttrium.
Claim 17
Dependent Claim
19 words
A process according to claim 12 in which said Group III metal comprises at least one rare earth metal.
Claim 18
Dependent Claim
17 words
The process according to claim 12 in which said magnetic inductor comprises a ferrous base metal alloy.
Claim 19
Dependent Claim
14 words
The process according to claim 12 in which said magnetic inductor comprises carbon steel.
Claim 20
Dependent Claim
14 words
The process according to claim 12 in which said magnetic inductor comprises silicon steel.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |