US3759724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhothermic composition for hot tops
Assignee: Shinto Kugyo K K
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Filing: 1971-09-14
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Granted: 1973-09-18
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Expires: 1991-09-14
Abstract
Abstract IN AN EXOTHERMIC COMPOSITION FOR A HOT TOP ON A FOUNDRY MOLD, THERE ARE PROVIDED FROM ABOUT 5 TO 30% BY WEIGHT OF FIBERS EACH HAVING A LENGTH OF ABOUT 0.5 TO 30 MM., THE FIBERS BEING EVENLY DISPERSED IN THE EXOTHERMIC COMPOSITION TO SEIZE THE FINE PARTICLES OF THE COMPOSITION AND TO PERMIT THE ESCAPE OF COMBUSTION GAS BUBBLES THROUGH NUMBEROUS CAVITIES FORMED THEREIN.
Inventors
- 👤 S Nishi
- 👤 S Ikeda
- 👤 T Torii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:33
CPC Classifications
B; B22; B22D; B22D7/00; B22D7/06; B22D7/10; B22D7/104
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |