Patent US2536204A successfully refreshed from Google Patents.
US2536204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of iron castings
Assignee: Union Carbide Corp
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Filing: 1947-01-08
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Granted: 1951-01-02
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Expires: 1967-01-08
Abstract
No abstract record available.
Inventors
- 👤 Morrogh Henton
- 👤 Gardner Arthur George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:53
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A METHOD OF PRODUCING IRON CASTINGS HAVING A FINELY DIVIDED EUTECTIFORM GRAPHITIC STRUCTURE WHICH COMPRISES PREPARING A BATH OF SULPHURCONTAINING, HIGH-CARBON IRON; INTRODUCING MANGANESE INTO SAID BATH IN AN AMOUNT GREATER THAN 1.7 TIMES THE PRECENTAGE OF SULPHUR IN SAID BATH PLUS 0.3; AND ADDING TO SAID BATH AT LEAST ONE METAL FROM THE GROUP CONSISTING OF ZIRCONIUM AND BISMUTH IN AN AMOUNT SUFFICIENT TO FORM AND INTRODUCE THE CARBIDE OF SAID METAL INTO THE MICROSTRUCTURE OF THE HIGH-CARBON IRON, SAID AMOUNT OF ADDED METAL BEING NOT LESS THAN 0.2%.
Claim 2
Independent Claim
90 words
A METHOD OF PRODUCING IRON CASTINGS HAVING A FINELY DIVIDED EUTECTIFORM GRAPHITIC STRUCTURE WHICH COMPRISES PREPARING A BATH OF SULPHURCONTAINING, HIGH-CARBON IRON; INTRODUCING MANGANESE INTO SAID BATH IN AN AMOUNT GREATER THAN 1.7 TIMES THE PRECENTAGE OF SULPHUR IN SAID BATH PLUS 0.3; AND ADDING TO SAID BATH AT LEAST ONE METAL FROM THE GROUP CONSISTING OF ZIRCONIUM AND BISMUTH IN AN AMOUNT SUFFICIENT TO FORM AND INTRODUCE THE CARBIDE OF SAID METAL INTO THE MICROSTRUCTURE OF THE HIGH-CARBON IRON, SAID AMOUNT OF ADDED METAL BEING NOT LESS THAN 0.2%.
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) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |