Patent US3258353A successfully refreshed from Google Patents.
US3258353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesia refractory product and process
Assignee: General Refractories Co
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Filing: 1963-01-25
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Granted: 1966-06-28
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Expires: 1983-01-25
Abstract
No abstract record available.
Inventors
- 👤 Heuer Russell Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:36
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/04; C04B35/043; C04B35/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A PROCESS OF PRODUCING A MAGNESIA REFRACTORY PRODUCT OF IMPROVED HIGH TEMPERATURE PROPERTIES, WHICH COMPRISES (A) MIXING TOGETHER PARTICLES OF CALCINED MAGNESIA, SAID CALCINED MAGNESIA HAVING THE FOLLOWING PROPERTIES AND COMPOSITION:
Claim 2
Dependent Claim
31 words
A PROCESS OF PRODUCING A MAGNESIA REFRACTORY PRODUCT OF IMPROVED HIGH TEMPERATURE PROPERTIES, WHICH COMPRISES (A) MIXING TOGETHER PARTICLES OF CALCINED MAGNESIA, SAID CALCINED MAGNESIA HAVING THE FOLLOWING PROPERTIES AND COMPOSITION:
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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |