US3244539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonded alumina refractory
Assignee: EIDP Inc
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Filing: 1963-07-11
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Granted: 1966-04-05
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Expires: 1983-07-11
Abstract
No abstract record available.
Inventors
- 👤 Hare Weston Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:23
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0036
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
A BONDED GRANULAR REFRACTORY CONSISTING ESSENTIALLY OF FROM ABOUT 30-89% BY WEIGHT OF ALUMINA PARTICLES AND A POROUS IN SITU OXIDIZED CRYSTALLING PHASE, SELECTED FROM THE GROUP CONSISTING OF ALPHA ALUMINA, COMPOUNDS OF ALUMINA WITH AT LEAST ONE OTHER METAL OXIDE AND SOLID SOLUTIONS OF A METAL OXIDE IN ALUMINA, SAID BONDING PHASE CONTAINING AT LEAST 72% BY WEIGHT OF ALUMINA BY ANALYSIS.
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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |