Patent US3176056A successfully refreshed from Google Patents.
US3176056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming and rapid firing periclase pellets
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1961-08-14
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Granted: 1965-03-30
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Expires: 1981-08-14
Abstract
No abstract record available.
Inventors
- 👤 James C Hicks
- 👤 Roger H Cook
- 👤 Lloyd M Housh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:09
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/02; C01F5/06; C01F5/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
METHOD OF PREPARING DENSE, HIGH PURITY PERICLASE GRAIN MATERIAL WHICH COMPRISES CALCINING PRECIPITATED, FINELY DIVIDED MAGNESIUM HYDROXIDE AT UP TO ABOUT 1000* C. TO FORM CAUSTIC MAGNESIA, FORMING SAID MAGNESIA INTO PELLETS UNDER HIGH PRESSURE, FIRING SAID PELLETS AT A TEMPERATURE INCREASING FROM ABOUT 1200*C. TO ABOUT 1670* C. AT A HEATING RATE OF AT LEAST 100*C. PER SECOND, MAINTAINING SAID PELLETS AT 1670*C FOR ABOUT ONE HOUR, AND COOLING TO RECOVER HIGH DENSITY 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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |