US3883346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel-lanthanum alloy produced by a reduction-diffusion process
Assignee: General Electric Co
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Filing: 1974-04-25
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Granted: 1975-05-13
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Expires: 1994-04-25
Abstract
Abstract A reduction-diffusion process for producing particles of a nickel-lanthanum alloy suitable for the selective absorption and storage of hydrogen by heating a particulate mixture of lanthanum oxide, nickel and calcium hydride to effect reduction of the lanthanum oxide and to diffuse the resulting lanthanum into the nickel particles to form the intermetallic compound.
Inventors
- 👤 Donald L Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:54
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/02; C22C1/023; Y; Y10; Y10S; Y10S420/00; Y10S420/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A HYDROGEN STORAGE MEDIUM CONSISTING ESSENTIALLY OF PARTICLES SUBSTANTIALLY FREE OF STRAIN RANGING IN SIZE FROM ABOUT 10 MICRONS TO 50 MICRONS CONSISTING ESSENTIALLY OF NICKELLATHANUM ALLOY HAVING A COMPOSITION WITHIN 155 BY WEIGHT OF THE STOICHIOMETRIC COMPOSITION OF THE NI5LA INTERMETALLIC COMPOUND AND CONTAINING ENTRAPPED CACLIUM IN AN AMOUNT RANGING FROM DETECTABLE AMOUNT UP TO ABOUT 0.4% BY WEIGHT OF SAID ALLOY, SAID CALCIUM BEING UNREMOVABLE WITHOUT MELTING SAID PARTICLES.
Claim 2
Dependent Claim
71 words
A HYDROGEN STORAGE MEDIUM CONSISTING ESSENTIALLY OF PARTICLES SUBSTANTIALLY FREE OF STRAIN RANGING IN SIZE FROM ABOUT 10 MICRONS TO 50 MICRONS CONSISTING ESSENTIALLY OF NICKELLATHANUM ALLOY HAVING A COMPOSITION WITHIN 155 BY WEIGHT OF THE STOICHIOMETRIC COMPOSITION OF THE NI5LA INTERMETALLIC COMPOUND AND CONTAINING ENTRAPPED CACLIUM IN AN AMOUNT RANGING FROM DETECTABLE AMOUNT UP TO ABOUT 0.4% BY WEIGHT OF SAID ALLOY, SAID CALCIUM BEING UNREMOVABLE WITHOUT MELTING SAID PARTICLES.
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 |