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Patent US3600158A successfully refreshed from Google Patents.
US3600158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-workable steel with sulfur and vanadium
Assignee: Inland Steel Co
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Filing: 1967-07-13
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Granted: 1971-08-17
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Expires: 1987-07-13
Abstract
Abstract PLAIN CARBON OR ALLOY STEEL HAVING SULFUR IN RESIDUAL OR RESULFURIZED AMOUNTS AND CONTAINING AT LEAST 0.01 WT. PERCENT BUT LESS THAN 0.03 WT. PERCENT VANADIUM, COLUMBIUM, TANTALUM OR COMBINATIONS THEREOF AS GRAIN REFINER. AUSTENITIC GRAIN SIZE AT LEAST AS FINE AS 7 ON ASTM SCALE. SULFUR-CONTAINING INCLUSIONS ALSO CONTAIN OXYGEN, IRON AND MANGANESE, HAVE A GLOBULAR SHAPE AND ARE RANDOMLY DISPERSED THROUGHOUT MICROSTRUCTURE. NO ALUMINUM.
Inventors
- 👤 Louis Molnar
- 👤 William E Heitmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:39
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |