US3373047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material for hot top
Assignee: Oglebay Norton Co
•
Filing: 1964-10-06
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Granted: 1968-03-12
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Expires: 1984-10-06
Abstract
No abstract record available.
Inventors
- 👤 Herbert D Sheets
- 👤 John W Lennon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:11
CPC Classifications
B; B22; B22D; B22D7/00; B22D7/06; B22D7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
AN INSULATING STRUCTURE FOR USE IN HOT TOPPING AND ADAPTED TO BE SUPPORTED AT THE UPPER END OF AN INGOT MOLD COMPRISING OF BODY TO BE SUPPORTED AT THE UPPER END OF THE INGOT MOLD, SAID BODY HAVING ONE SURFACE FOR DEFINING AT LEAST A PORTION OF AN OPENING THROUGH WHICH MOLTEN METAL IS POURED INTO THE MOLD, SAID ONE SURFACE BEING CONTACTED BY MOLTEN METAL POURED INTO THE MOLD, AND SAID BODY AT LEAST IN PART CONSTRUCTED OF A MIXTURE CONSISTING ESSENTIALLY OF 79-90 PARTS BY WEIGHT OF GRANULAR REFRACTORY FILLER, 5-10 PARTS BY WEIGHT OF INORGANIC FIBROUS ASBESTOS FROM MATERIAL HAVING A WATER CONTENT BETWEEN 0 TO 6%, 0 TO 2 PARTS BY WEIGHT OF ORGANIC FIBROUS MATERIAL, AND 5-10 PARTS BY WEIGHT OF A BINDER THEREOF.
Claim 2
Dependent Claim
129 words
AN INSULATING STRUCTURE FOR USE IN HOT TOPPING AND ADAPTED TO BE SUPPORTED AT THE UPPER END OF AN INGOT MOLD COMPRISING OF BODY TO BE SUPPORTED AT THE UPPER END OF THE INGOT MOLD, SAID BODY HAVING ONE SURFACE FOR DEFINING AT LEAST A PORTION OF AN OPENING THROUGH WHICH MOLTEN METAL IS POURED INTO THE MOLD, SAID ONE SURFACE BEING CONTACTED BY MOLTEN METAL POURED INTO THE MOLD, AND SAID BODY AT LEAST IN PART CONSTRUCTED OF A MIXTURE CONSISTING ESSENTIALLY OF 79-90 PARTS BY WEIGHT OF GRANULAR REFRACTORY FILLER, 5-10 PARTS BY WEIGHT OF INORGANIC FIBROUS ASBESTOS FROM MATERIAL HAVING A WATER CONTENT BETWEEN 0 TO 6%, 0 TO 2 PARTS BY WEIGHT OF ORGANIC FIBROUS MATERIAL, AND 5-10 PARTS BY WEIGHT OF A BINDER THEREOF.
References Cited (Backward Citations)
US3123878A
Cited
US1921729A
Cited
US2385500A
Cited
US3072981A
Cited
US3230056A
Cited
US3262165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |