US2794731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reducing refining of cast irons and steels
Assignee: RES INST
•
Filing: 1954-07-21
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Granted: 1957-06-04
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Expires: 1974-07-21
Abstract
No abstract record available.
Inventors
- 👤 Iwase Keizo
- 👤 Honma Masao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:38
CPC Classifications
C; C21; C21C; C21C1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A METHOD OF PRODUCING TOUGH CAST ION AND STEEL CONTAINING SHORT FLAKE GRAPHITE AND NODULAR GRAPHITE WHICH COMPRISES REDUCING-REFINING THE RAW METAL IN A MELTING FURNACE WITH A REFINING AGENT CONTAINING A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF THE OXIDES AND CARBONATES OF THE ALKALI AND ALKALINE EARTH METALS AND A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF CARBON, SILICON AND ALUMINUM AND A FURTHER REFINING AGENT COMPRISING CACN2 AND A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF SIO2, CAO AND AL2O3.
Claim 2
Independent Claim
83 words
A METHOD OF PRODUCING TOUGH CAST ION AND STEEL CONTAINING SHORT FLAKE GRAPHITE AND NODULAR GRAPHITE WHICH COMPRISES REDUCING-REFINING THE RAW METAL IN A MELTING FURNACE WITH A REFINING AGENT CONTAINING A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF THE OXIDES AND CARBONATES OF THE ALKALI AND ALKALINE EARTH METALS AND A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF CARBON, SILICON AND ALUMINUM AND A FURTHER REFINING AGENT COMPRISING CACN2 AND A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF SIO2, CAO AND AL2O3.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |