Patent US3585058A successfully refreshed from Google Patents.
US3585058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alumina-chrome refractories
Assignee: Dresser Industries Inc
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Filing: 1968-06-03
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Granted: 1971-06-15
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Expires: 1988-06-03
Abstract
Abstract SLINTERED REFRACTORY COMPRISING FROM 25 TO 60%, BY WEIGHT, CR2O3, 1/2 TO 10% TIO2, THE REMAINDER AL2O3 AND LESS THAN 1% ASSOCIATED IMPURITIES.
Inventors
- 👤 Daniel E Reardon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:57
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/04; C21B7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |