Patent US2641531A successfully refreshed from Google Patents.
US2641531A
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Preparation of periclase
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1949-11-08
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Granted: 1953-06-09
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Expires: 1969-11-08
Abstract
No abstract record available.
Inventors
- 👤 Leslie W Austin
- 👤 Clarence A Rick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:47
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/02; C01F5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A PROCESS FOR PREPARING DENSE PERICLASE REFRACTORY MATERIAL WHICH COMPRISES INTIMATELY ADMIXING A FINELY DIVIDED PERICLASE-FORMING MAGNESIUM COMPOUND CONTAINING AT LEAST 95.0% MGO AND NOT OVER 2.0% OF SIO2 ON THE IGNITED BASIS, CHROMIUM MATERIAL AS A CRYSTALLIZATION PROMOTER, AND AT LEAST ONE SECONDARY CRYSTALLIZATION PROMOTING METAL COMPOUND ADAPTED TO FORM A REFRACTORY MULTIPLE OXIDE UPON FIRING, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, BERYLLIUM, COBALT, LEAD, COPPER, MANGANESE, NICKEL, VANADIUM, ZINC AND ZIRCONIUM, SAID METAL COMPOUND BEING ADDED TO PROVIDE A MINIMUM AMOUNT ON THE ORDER OF ABOUT 1/16%, SAID CHROMIUM MATERIAL AND SAID METAL COMPOUND BEING ADDED IN TOTAL AMOUNT UP TO ABOUT 2.0%, SAID AMOUNTS BEING BASED ON THE TOTAL WEIGHT OF THE FIRED PRODUCT AND CALCULATED AS THE OXIDES, AND FIRING SAID ADMIXTURE TO FORM A WELLCRYSTALLIZED PERICLASE.
Claim 2
Dependent Claim
135 words
A PROCESS FOR PREPARING DENSE PERICLASE REFRACTORY MATERIAL WHICH COMPRISES INTIMATELY ADMIXING A FINELY DIVIDED PERICLASE-FORMING MAGNESIUM COMPOUND CONTAINING AT LEAST 95.0% MGO AND NOT OVER 2.0% OF SIO2 ON THE IGNITED BASIS, CHROMIUM MATERIAL AS A CRYSTALLIZATION PROMOTER, AND AT LEAST ONE SECONDARY CRYSTALLIZATION PROMOTING METAL COMPOUND ADAPTED TO FORM A REFRACTORY MULTIPLE OXIDE UPON FIRING, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, BERYLLIUM, COBALT, LEAD, COPPER, MANGANESE, NICKEL, VANADIUM, ZINC AND ZIRCONIUM, SAID METAL COMPOUND BEING ADDED TO PROVIDE A MINIMUM AMOUNT ON THE ORDER OF ABOUT 1/16%, SAID CHROMIUM MATERIAL AND SAID METAL COMPOUND BEING ADDED IN TOTAL AMOUNT UP TO ABOUT 2.0%, SAID AMOUNTS BEING BASED ON THE TOTAL WEIGHT OF THE FIRED PRODUCT AND CALCULATED AS THE OXIDES, AND FIRING SAID ADMIXTURE TO FORM A WELLCRYSTALLIZED PERICLASE.
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) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |