US3656989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of metal-impregnated porous coke materials
Assignee: Foseco International Ltd
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Filing: 1970-03-12
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Granted: 1972-04-18
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Expires: 1990-03-12
Abstract
Abstract Metal impregnated porous materials, e.g. magnesium impregnated coke, are produced by immersing pieces of porous material in molten metal and then dumping them into a fluidized bed of granular material to quench them.
Inventors
- 👤 Kenneth Frederick Layland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:42
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/08; C21C1/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
19 words
A process according to claim 1 wherein the fluidization of the bed is maintained substantially throughout the quenching step.
Claim 2
Dependent Claim
16 words
A process according to claim 1 wherein the fluidized bed consists substantially of fine dry sand.
Claim 3
Dependent Claim
25 words
A process according to claim 1 wherein the fluidized bed contains a granular fusible material which forms a coating on the pieces of porous material.
Claim 4
Dependent Claim
29 words
A process according to claim 4 wherein the granular fusible material is a member selected from the group consisting of alkali and alkaline earth metal halides and complex halides.
Claim 5
Dependent Claim
17 words
A process according to claim 4 wherein the granular fusible material is a rare earth metal halide.
Claim 6
Dependent Claim
30 words
A process according to claim 1 wherein the metal for impregnating is an alloy containing at least one metal selected from the group consisting of magnesium, sodium, potassium and lithium.
Claim 7
Dependent Claim
26 words
A process according to claim 1 wherein the particulate material has a density between the density of the porous coke carrier and the fully impregnated product.
Claim 8
Dependent Claim
43 words
A process according to claim 1 wherein the fluidized bed presents a top surface and lower ranges which includes skimming the lightly impregnated material from the surface of the bed and recovering the quenched impregnated product from the lower ranges of the bed.
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |