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US4079523A
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Iron-titanium-mischmetal alloys for hydrogen storage
Assignee: ERGENICS Inc A NJ CORP
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Filing: 1976-11-08
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Granted: 1978-03-21
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Expires: 1996-11-08
Abstract
Abstract A method for the preparation of an iron-titanium-mischmetal alloy which is used for the storage of hydrogen. The alloy is prepared by air-melting an iron charge in a clay-graphite crucible, adding titanium and deoxidizing with mischmetal. The resultant alloy contains less than about 0.1% oxygen and exhibits a capability for hydrogen sorption in less than half the time required by vacuum-melted, iron-titanium alloys.
Inventors
- 👤 Gary Dale Sandrock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:22
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/0005; C01B3/001; C01B3/0018; C01B3/0031; C01B3/0047; C01B3/0057; C01B3/0036; C22; C22C; C22C38/00; C22C38/14; F; F17; F17C; F17C11/00; F17C11/005; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/32; Y10; Y10S; Y10S420/00; Y10S420/90
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
145 words
A method for air-melting an alloy containing, in weight percent, from about 42% to about 52% titanium, from about 0.05% to about 1.5% mischmetal, up to about 0.1% oxygen, up to about 10% nickel, up to about 10% manganese, and the balance essentially iron, said alloy characterized by suitability for use in hydrogen storage apparatus, comprising: a. melting a charge of iron in a clay-graphite crucible; b. adding a charge of titanium to the molten iron to form a molten alloy within said crucible while heating said molten alloy to a temperature of about 1425° C; c. deoxidizing said molten alloy within said crucible with a mischmetal addition to form a deoxidized molten alloy; an oxide-containing slag; and result in on amount of mischmetal in said molten alloy of about 0.05% to about 1.5% mischmetal and d. pouring said deoxidized molten alloy from said crucible.
Claim 2
Independent Claim
145 words
A method for air-melting an alloy containing, in weight percent, from about 42% to about 52% titanium, from about 0.05% to about 1.5% mischmetal, up to about 0.1% oxygen, up to about 10% nickel, up to about 10% manganese, and the balance essentially iron, said alloy characterized by suitability for use in hydrogen storage apparatus, comprising: a. melting a charge of iron in a clay-graphite crucible; b. adding a charge of titanium to the molten iron to form a molten alloy within said crucible while heating said molten alloy to a temperature of about 1425° C; c. deoxidizing said molten alloy within said crucible with a mischmetal addition to form a deoxidized molten alloy; an oxide-containing slag; and result in on amount of mischmetal in said molten alloy of about 0.05% to about 1.5% mischmetal and d. pouring said deoxidized molten alloy from said crucible.
Claim 3
Dependent Claim
17 words
A method as defined in claim 1, wherein said clay-graphite crucible is contained within an induction furnace.
Claim 4
Dependent Claim
15 words
A method as defined in claim 1, wherein melting is performed under an argon blanket.
Claim 5
Dependent Claim
25 words
A method as defined in claim 1, wherein said charge of titanium comprises at least one of titanium pieces, consolidated titanium sponge, and ferrotitanium alloy.
Claim 6
Dependent Claim
25 words
A method as defined in claim 1, wherein said mischmetal addition is added in an amount of from about 2% to about 8%, by weight.
Claim 7
Dependent Claim
20 words
A method as defined in claim 5, wherein said mischmetal addition is in an amount of about 4%, by weight.
Claim 8
Dependent Claim
83 words
An alloy characterized by an advantageous capability for the sorption of hydrogen within less than half the time period required with vacuum melted iron-titanium hydrogen storage alloys containing, in weight percent, from about 42% to about 52% titanium, from about 0.05% to about 1.5% mischmetal, said mischmetal containing elements having atomic numbers between 57 and 71, up to about 0.1% oxygen, up to about 10% manganese, up to about 10% nickel, and the balance essentially iron, said alloy particularly suited for air melting.
Claim 9
Dependent Claim
83 words
An alloy characterized by an advantageous capability for the sorption of hydrogen within less than half the time period required with vacuum melted iron-titanium hydrogen storage alloys containing, in weight percent, from about 42% to about 52% titanium, from about 0.05% to about 1.5% mischmetal, said mischmetal containing elements having atomic numbers between 57 and 71, up to about 0.1% oxygen, up to about 10% manganese, up to about 10% nickel, and the balance essentially iron, said alloy particularly suited for air melting.
Claim 10
Dependent Claim
23 words
An alloy as defined in claim 7 containing from about 45% to about 50% titanium and from about 0.1% to about 1.2% mischmetal.
Claim 11
Independent Claim
87 words
The method of storing hydrogen characterized by an advantageous capability for the sorption of hydrogen within less than half the time period required with vacuum melted iron-titanium hydrogen storage alloys comprising contacting hydrogen gas with a granulated alloy containing, in weight percent, from about 42% to about 52% titanium from about 0.05% to about 1.5% mischmetal, said mischmetal containing elements having atomic numbers between 57 and 71, up to about 0.1% oxygen, up to about 10% manganese, up to about 10% nickel, and the balance essentially iron.
Claim 12
Independent Claim
87 words
The method of storing hydrogen characterized by an advantageous capability for the sorption of hydrogen within less than half the time period required with vacuum melted iron-titanium hydrogen storage alloys comprising contacting hydrogen gas with a granulated alloy containing, in weight percent, from about 42% to about 52% titanium from about 0.05% to about 1.5% mischmetal, said mischmetal containing elements having atomic numbers between 57 and 71, up to about 0.1% oxygen, up to about 10% manganese, up to about 10% nickel, and the balance essentially iron.
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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) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |