Patent US3846145A successfully refreshed from Google Patents.
US3846145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory articles for metal pouring tubes and the like
Assignee: CHAS TAYLORS SONS CO US
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Filing: 1973-09-17
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Granted: 1974-11-05
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Expires: 1993-09-17
Abstract
Abstract 1. REFRACTORY COMPOSITION USEFUL FOR MAKING METAL POURING TUBES AND THE LIDE CONSISTING ESSENTIALLY OF FROM 45% TO 75% OF A FUSION PRODUCT, FROM 10% TO 30% KYANITE, FROM 3% TO 15% ZIRCON, FROM 3% TO 12% CALCINED ALUMINA AND FROM 0.5% TO 10% CHROMIC OXIDE, SAID FUSION PRODUCT BEING A FUSED AGGREGATE OF SUBSTANTIALLY 0.5 TO 1.5 PARTS OF ZIRCON FOR EACH PART OF ALUMINA, SAID COMPOSITION ALSO CONTAINING IN ADDITION FROM 1% TO 7% SILICA.
Inventors
- 👤 N Roudabush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:28
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/101; C04B35/106; C04B35/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
REFRACTORY COMPOSITION USEFUL FOR MAKING METAL POURING TUBES AND THE LIDE CONSISTING ESSENTIALLY OF FROM 45% TO 75% OF A FUSION PRODUCT, FROM 10% TO 30% KYANITE, FROM 3% TO 15% ZIRCON, FROM 3% TO 12% CALCINED ALUMINA AND FROM 0.5% TO 10% CHROMIC OXIDE, SAID FUSION PRODUCT BEING A FUSED AGGREGATE OF SUBSTANTIALLY 0.5 TO 1.5 PARTS OF ZIRCON FOR EACH PART OF ALUMINA, SAID COMPOSITION ALSO CONTAINING IN ADDITION FROM 1% TO 7% SILICA.
Claim 2
Dependent Claim
76 words
REFRACTORY COMPOSITION USEFUL FOR MAKING METAL POURING TUBES AND THE LIDE CONSISTING ESSENTIALLY OF FROM 45% TO 75% OF A FUSION PRODUCT, FROM 10% TO 30% KYANITE, FROM 3% TO 15% ZIRCON, FROM 3% TO 12% CALCINED ALUMINA AND FROM 0.5% TO 10% CHROMIC OXIDE, SAID FUSION PRODUCT BEING A FUSED AGGREGATE OF SUBSTANTIALLY 0.5 TO 1.5 PARTS OF ZIRCON FOR EACH PART OF ALUMINA, SAID COMPOSITION ALSO CONTAINING IN ADDITION FROM 1% TO 7% SILICA.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |