US3332772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of molten ferrous base metals
Assignee: Crane Co
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Filing: 1965-06-30
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Granted: 1967-07-25
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Expires: 1985-06-30
Abstract
No abstract record available.
Inventors
- 👤 Jerome J Kanter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:23
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN THE PROCESS FOR PRODUCING NODULAR GRAPHITE CAST IRON BY TREATMENT OF MOLTEN CAST IRON WITH NODULARIZING AGENTS, THE METHOD OF PURIFYING THE MOLTEN CAST IRON OF UNDESIRABLE CATIONIC ELEMENTS INCLUDING ALUMINUM, TITANIUM, MANGANESE, CHROMIUM, TIN AND LEAD PREPARATORY TO THE NODULARIZING STEP, WHICH COMPRISES; PREPARING A CAST IRON MELT CONTAINING AT LEAST ONE UNDESIRABLE CATIONIC CONTAMINANT, SAID CATIONIC CONTAMINANT HAVING A FREE ENERGY OF FORMATION OF A CHLORIDE GREATER THAN FERROUS CHLORIDE AND LESS THAN MAGNESIUM CHLORIDE, AND TREATING SAID MOLTEN CAST IRON MELT BY INTRODUCINT A SOLID CHARGE CONTAINING SUFFICIENT FERROUS CHLORIDE TO REACT WITH SAID UNDESIRABLE CONTAMINANTS.
Claim 2
Dependent Claim
100 words
IN THE PROCESS FOR PRODUCING NODULAR GRAPHITE CAST IRON BY TREATMENT OF MOLTEN CAST IRON WITH NODULARIZING AGENTS, THE METHOD OF PURIFYING THE MOLTEN CAST IRON OF UNDESIRABLE CATIONIC ELEMENTS INCLUDING ALUMINUM, TITANIUM, MANGANESE, CHROMIUM, TIN AND LEAD PREPARATORY TO THE NODULARIZING STEP, WHICH COMPRISES; PREPARING A CAST IRON MELT CONTAINING AT LEAST ONE UNDESIRABLE CATIONIC CONTAMINANT, SAID CATIONIC CONTAMINANT HAVING A FREE ENERGY OF FORMATION OF A CHLORIDE GREATER THAN FERROUS CHLORIDE AND LESS THAN MAGNESIUM CHLORIDE, AND TREATING SAID MOLTEN CAST IRON MELT BY INTRODUCINT A SOLID CHARGE CONTAINING SUFFICIENT FERROUS CHLORIDE TO REACT WITH SAID UNDESIRABLE CONTAMINANTS.
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) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |