US3558591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat insulators for use in the casting of molten metal
Assignee: Foseco International Ltd
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Filing: 1969-07-03
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Granted: 1971-01-26
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Expires: 1989-07-03
Abstract
Abstract COMPOSITIONS OF MATTER SUITABLE FOR USE IN THE PRODUCTION OF HOT TOP LININGS AND THE LIKE COMPRISE 15 TO 50% BY WEIGHT OF FIBROUS MATERIAL, 40 TO 80% OF REFRACTORY FILLER AND 0.5 TO 10% OF A BINDER MATERIAL. THE FIBROUS MATERIAL IS WHOLLY INORGANIC FIBROUS MATEIAL OR CONTAINS UP TO 40% OF ITS WEIGHT OF ORGANIC FIBROUS MATERIAL, AND THE REFRACTORY FILLER CONSISTS IN WHOLE OR IN PART OR DIATOMACEOUS EARTH, BUBBLE ALUMINA, HOLLOW SILICA MICROSPHERES, CALCINED RICE HUSKS OR POZZOLANA (BUBBLED ALUMINOSILICATE).
Inventors
- 👤 Michael Robert Yendrek
- 👤 Robert Richard Dzurilla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:26
CPC Classifications
B; B22; B22D; B22D7/00; B22D7/06; B22D7/10; Y; Y10; Y10S; Y10S525/00; Y10S525/935
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |