US2631353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized alumina peebles
Assignee: —
•
Filing: —
•
Granted: 1953-03-17
•
Expires: 1970-03-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:42
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/64; C04B2235/00; C04B2235/70; C04B2235/74; C04B2235/77; C04B2235/94
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR MANUFACTURING PEBBLES FOR MOVING-BED HEAT-TRANSFER PURPOSES WHICH COMPRISES FORMING A HOMOGENEOUS MIXTURE OF ALUMINA AND A VANADIUM COMPOUND OF THE CLASS CONSISTING OF THE OXIDES AND COMPOUNDS CONVERTED TO AN OXIDE BY CALCINATION IN AN AMOUNT IN THE RANGE OF 0.2 TO 5.0 PER CENT (CALCULATED AS V2O5) BY WEIGHT OF THE ALUMINA; COMPACTING THE MIX INTO DENSE COHERENT BALLS; AND CALCINING THE BALLS AT A TEMPERATURE IN THE RANGE OF 2900* TO 3200* F. FOR AT LEAST 3 HOURS AND UNTIL THEIR POROSITY LIES IN THE RANGE OF 5 TO 18 PER CENT.
Claim 2
Dependent Claim
97 words
A PROCESS FOR MANUFACTURING PEBBLES FOR MOVING-BED HEAT-TRANSFER PURPOSES WHICH COMPRISES FORMING A HOMOGENEOUS MIXTURE OF ALUMINA AND A VANADIUM COMPOUND OF THE CLASS CONSISTING OF THE OXIDES AND COMPOUNDS CONVERTED TO AN OXIDE BY CALCINATION IN AN AMOUNT IN THE RANGE OF 0.2 TO 5.0 PER CENT (CALCULATED AS V2O5) BY WEIGHT OF THE ALUMINA; COMPACTING THE MIX INTO DENSE COHERENT BALLS; AND CALCINING THE BALLS AT A TEMPERATURE IN THE RANGE OF 2900* TO 3200* F. FOR AT LEAST 3 HOURS AND UNTIL THEIR POROSITY LIES IN THE RANGE OF 5 TO 18 PER CENT.
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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) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |