Patent US3986912A successfully refreshed from Google Patents.
Patent US2937425A successfully refreshed from Google Patents.
US2937425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of castings and ingots
Assignee: Foundry Services International Ltd
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Filing: 1959-06-18
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Granted: 1960-05-24
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Expires: 1979-06-18
Abstract
No abstract record available.
Inventors
- 👤 Morgan Hugh Myllon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:09
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/04; C21; C21C; C21C7/00; C22B5/06; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
AN EXOTHERMIC COMPOSITION FOR USE IN THE PRODUCTION OF STEEL INGOTS AND CASTINGS CONSISTING ESSENTIALLY OF A MIXTURE OF 15 TO 30% ALUMINIUM AND 45 TO 84% IRON OXIDE, CALCULATED AS FE3O4, THE SAID MIXTURE CONTAINING BASED ON THE WEIGHT OF THE ALUMINUM, 1 TO 8% OF COPPER AND 0 TO 4% OF NICKEL, THE RATIO OF IRON OXIDE, CALCULATED AS FE3O4, TO ALUMINIUM BEING WITHIN THE RANGE OF 3.3:1 TO 4:1.
Claim 2
Dependent Claim
72 words
AN EXOTHERMIC COMPOSITION FOR USE IN THE PRODUCTION OF STEEL INGOTS AND CASTINGS CONSISTING ESSENTIALLY OF A MIXTURE OF 15 TO 30% ALUMINIUM AND 45 TO 84% IRON OXIDE, CALCULATED AS FE3O4, THE SAID MIXTURE CONTAINING BASED ON THE WEIGHT OF THE ALUMINUM, 1 TO 8% OF COPPER AND 0 TO 4% OF NICKEL, THE RATIO OF IRON OXIDE, CALCULATED AS FE3O4, TO ALUMINIUM BEING WITHIN THE RANGE OF 3.3:1 TO 4:1.
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) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |