US3861849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing oxide refractory material having fine crystal structure
Assignee: Electro Minerals Canada Inc
•
Filing: 1972-09-18
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Granted: 1975-01-21
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Expires: 1992-09-18
Abstract
Abstract Oxide refractory materials (for example, alumina-zirconia mixtures) can be cast by a semicontinuous process to have an extremely fine crystal structure, by casting a melt of the oxide refractory materials onto a non-reactive, non-melting particulate solid cooling media of a material other than that of the oxide refractory material (for example, steel spheres having a size ranging from about 5 to about 60 mm), additional cooling media being added to the solidification chamber while the oxide refractory melt is cast onto the cooling media. The melt is then cast upon the additional cooling media, until the solidification chamber is nearly filled with both oxide refractory material and cooling media. The solidified material, when crushed and graded, has exceptional utility as an extremely tough abrasive grain.
Inventors
- 👤 Wesley Q Richmond
- 👤 Paul Cichy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:59
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/653; Y; Y10; Y10S; Y10S425/00; Y10S425/101
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
11 words
APPARATUS FOR RAPIDLY COOLING AND SOLIDIFYING AN OXIDE REFRACTORY MELT, COMPRISING:
Claim 2
Dependent Claim
11 words
APPARATUS FOR RAPIDLY COOLING AND SOLIDIFYING AN OXIDE REFRACTORY MELT, COMPRISING:
Claim 3
Dependent Claim
14 words
A SOLIDIFICATION CHAMBER HAVING A CLOSED BOTTOM AND A DEPTH OF GREATER THAN 15CM,
Claim 4
Dependent Claim
14 words
A SOLIDIFICATION CHAMBER HAVING A CLOSED BOTTOM AND A DEPTH OF GREATER THAN 15CM,
Claim 5
Dependent Claim
59 words
AN INITIAL SUPPLY OF NON-REACTIVE, NON-MELTING PARTICULAR SOLID COOLING MEDIA COMPRISING CARBON STEELSPHERES RANGING IN DIAMETER FROM ABOUT 5 TO ABOUT 60 MM, WHICH FILLS THE SOLIDIFICATION CHAMBER TO A DEPTH OF AT LEAST ABOUT 15 CM, THE SOLID COOLING MEDIA BEING OF A MATERIAL OTHER THAN THAT OF THE OXIDE REFRACTORY MELT TO BE RAPIDLY COOLED AND SOLIDIFIED,
Claim 6
Dependent Claim
59 words
AN INITIAL SUPPLY OF NON-REACTIVE, NON-MELTING PARTICULAR SOLID COOLING MEDIA COMPRISING CARBON STEELSPHERES RANGING IN DIAMETER FROM ABOUT 5 TO ABOUT 60 MM, WHICH FILLS THE SOLIDIFICATION CHAMBER TO A DEPTH OF AT LEAST ABOUT 15 CM, THE SOLID COOLING MEDIA BEING OF A MATERIAL OTHER THAN THAT OF THE OXIDE REFRACTORY MELT TO BE RAPIDLY COOLED AND SOLIDIFIED,
Claim 7
Dependent Claim
60 words
an initial supply of non-reactive, non-melting particulate solid cooling media comprising carbon steel spheres ranging in diameter from about 5 to about 60 mm, which fills the solidification chamber to a depth of at least about 15 cm, the solid cooling media being of a material other than that of the oxide refractory melt to be rapidly cooled and solidified;
Claim 8
Dependent Claim
60 words
an initial supply of non-reactive, non-melting particulate solid cooling media comprising carbon steel spheres ranging in diameter from about 5 to about 60 mm, which fills the solidification chamber to a depth of at least about 15 cm, the solid cooling media being of a material other than that of the oxide refractory melt to be rapidly cooled and solidified;
Claim 9
Dependent Claim
23 words
Apparatus according to claim 1, wherein the source of oxide refractory material is provided with a plurality of inlets into the solidification chamber.
Claim 10
Dependent Claim
23 words
Apparatus according to claim 1, wherein the source of additional cooling media is provided with a plurality of inlets into the solidification chamber.
Claim 11
Dependent Claim
16 words
means for casting the oxide refractory melt into the solidification chamber, over the cooling media; and
Claim 12
Dependent Claim
16 words
means for casting the oxide refractory melt into the solidification chamber, over the cooling media; and
Claim 13
Dependent Claim
16 words
MEANS FOR CASTING THE OXIDE REFRACTORY MELT INTO THE SOLIDIFICATION CHAMBER, OVER THE COOLING MEDIA, AND
Claim 14
Dependent Claim
16 words
MEANS FOR CASTING THE OXIDE REFRACTORY MELT INTO THE SOLIDIFICATION CHAMBER, OVER THE COOLING MEDIA, AND
Claim 15
Dependent Claim
44 words
MEANS FOR ADDING ADDITIONAL SOLID COOLING MEDIA COMPRIING CARBON STEEL SPHERES RANGING IN DIAMETER FROM ABOUT 5 TO ABOUT 60 MM OVER THE CAST OXIDE REFRACTORY, AND MEANS FOR CASTING ADDITIONAL OXIDE REFRACTORY MELT OVER THE ADDITIONAL SOLID COOLING MEDIA IN THE SOLIDIFICATION CHAMBER.
Claim 16
Dependent Claim
44 words
MEANS FOR ADDING ADDITIONAL SOLID COOLING MEDIA COMPRIING CARBON STEEL SPHERES RANGING IN DIAMETER FROM ABOUT 5 TO ABOUT 60 MM OVER THE CAST OXIDE REFRACTORY, AND MEANS FOR CASTING ADDITIONAL OXIDE REFRACTORY MELT OVER THE ADDITIONAL SOLID COOLING MEDIA IN THE SOLIDIFICATION CHAMBER.
Claim 17
Dependent Claim
44 words
means for adding additional solid cooling media comprising carbon steel spheres ranging in diameter from about 5 to about 60 mm over the cast oxide refractory, and means for casting additional oxide refractory melt over the additional solid cooling media in the solidification chamber.
Claim 18
Dependent Claim
44 words
means for adding additional solid cooling media comprising carbon steel spheres ranging in diameter from about 5 to about 60 mm over the cast oxide refractory, and means for casting additional oxide refractory melt over the additional solid cooling media in the solidification chamber.
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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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |