US2630616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized alumina pebbles
Assignee: Phillips Petroleum Co
•
Filing: 1948-10-08
•
Granted: 1953-03-10
•
Expires: 1968-10-08
Abstract
No abstract record available.
Inventors
- 👤 Sam P Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:21
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/021; C01F7/025; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/60; C01P2004/61; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS FOR MANUFACTURING STABILIZED ALUMINA CONTACT MATERIAL IN THE FORM OF PEBBLES CAPABLE OF WITHSTANDING CYCLIC THERMAL AND MECHANICAL SHOCK OVER LONG PERIODS WIHTOUT BREAKAGE AND HIGHLY ATTRITION RESISTANT, WHICH COMPRISES COMPACTING 1/8" TO 1" SPHERES FROM FINELY COMMINUTED ACTIVE ALUMINA AND PHOSPHORIC ACID IN WHICH THE PHOSPHORIC ACID (CALCULATED AS P205) AMOUNTS TO BETWEEN 0.1 AND 10% BY WEIGHT OF THE ALUMINA; SLOWLY DRYING SAID SPHERES; AND CALCINING THE DRIED SPHERES AT A TEMPERATURE IN THE RANGE OF 2800* TO 3200* F. FOR AT LEAST 2 HOURS AND UNTIL THE POROSITY LIES IN THE RANGES OF 5 TO 25%.
Claim 2
Dependent Claim
101 words
A PROCESS FOR MANUFACTURING STABILIZED ALUMINA CONTACT MATERIAL IN THE FORM OF PEBBLES CAPABLE OF WITHSTANDING CYCLIC THERMAL AND MECHANICAL SHOCK OVER LONG PERIODS WIHTOUT BREAKAGE AND HIGHLY ATTRITION RESISTANT, WHICH COMPRISES COMPACTING 1/8" TO 1" SPHERES FROM FINELY COMMINUTED ACTIVE ALUMINA AND PHOSPHORIC ACID IN WHICH THE PHOSPHORIC ACID (CALCULATED AS P205) AMOUNTS TO BETWEEN 0.1 AND 10% BY WEIGHT OF THE ALUMINA; SLOWLY DRYING SAID SPHERES; AND CALCINING THE DRIED SPHERES AT A TEMPERATURE IN THE RANGE OF 2800* TO 3200* F. FOR AT LEAST 2 HOURS AND UNTIL THE POROSITY LIES IN THE RANGES OF 5 TO 25%.
References Cited (Backward Citations)
US1949038A
Cited
US2007742A
Cited
US2061099A
Cited
US2035845A
Cited
US2304133A
Cited
US2389636A
Cited
US2463979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |