US2618566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesium aluminate pebble
Assignee: Phillips Petroleum Co
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Filing: 1949-12-09
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Granted: 1952-11-18
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Expires: 1969-12-09
Abstract
No abstract record available.
Inventors
- 👤 Sam P Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:10
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/42; C04B35/12; C04B35/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
AN ALUMINA-BONDED SPINEL PEBBLE CONSISTING ESSENTIALLY OF A MAJOR PORTION OF MAGNESIUM ALUMINATE CRYSTALS AND A MINOR PORTION OF ALUMINA IN THE FORM OF ALPHA CORUNDUM CRYSTALS, SAID ALUMINA BEING STABILIZED AGAINST CRYSTAL GROWTH WITH CRYSTALS OF A METAL OXIDE ALPHA CORUNDUM CRYSTAL STABILIZER, SAID CORUNDUM AND METAL OXIDE CRYSTALS BEING DISPERSED IN INTERLOCKING ARRANGEMENT WITH THE MAGNESIUM ALUMINATE CRYSTALS THROUGHOUT SAID PEBBLE.
Claim 2
Dependent Claim
63 words
AN ALUMINA-BONDED SPINEL PEBBLE CONSISTING ESSENTIALLY OF A MAJOR PORTION OF MAGNESIUM ALUMINATE CRYSTALS AND A MINOR PORTION OF ALUMINA IN THE FORM OF ALPHA CORUNDUM CRYSTALS, SAID ALUMINA BEING STABILIZED AGAINST CRYSTAL GROWTH WITH CRYSTALS OF A METAL OXIDE ALPHA CORUNDUM CRYSTAL STABILIZER, SAID CORUNDUM AND METAL OXIDE CRYSTALS BEING DISPERSED IN INTERLOCKING ARRANGEMENT WITH THE MAGNESIUM ALUMINATE CRYSTALS THROUGHOUT SAID PEBBLE.
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) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |