US3178279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitride bearing low-manganese ductile steel
Assignee: IHI Corp
•
Filing: 1962-04-20
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Granted: 1965-04-13
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Expires: 1982-04-20
Abstract
No abstract record available.
Inventors
- 👤 Nakamura Hajime
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:25
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/06; C22C38/18; C22C38/40; C22C38/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A NITRIDE BEARING LOW MANGANESE DUCTILE STEEL CONSISTING ESSENTIALLY OF, BY WEIGHT, 0.05% TO 0.15% CARBON, LESS THAN 0.60% SILICON, 1.0% TO 2.5% MANGANESE, 0.03% TO 0.12% ALUMINUM NITRIDE, 0.003% TO 0.15% METALLIC ALUMINUM IN SOLID SOLUTION, BALANCE IRON WITH INCIDENTAL IMPURITIES, SAID STEEL HAVING A GRAIN SIZE FINER THAN NUMBER 9 IN TERMS OF THE ASTM FERRITE GRAIN SIZE NUMBERING SYSTEM.
Claim 2
Dependent Claim
62 words
A NITRIDE BEARING LOW MANGANESE DUCTILE STEEL CONSISTING ESSENTIALLY OF, BY WEIGHT, 0.05% TO 0.15% CARBON, LESS THAN 0.60% SILICON, 1.0% TO 2.5% MANGANESE, 0.03% TO 0.12% ALUMINUM NITRIDE, 0.003% TO 0.15% METALLIC ALUMINUM IN SOLID SOLUTION, BALANCE IRON WITH INCIDENTAL IMPURITIES, SAID STEEL HAVING A GRAIN SIZE FINER THAN NUMBER 9 IN TERMS OF THE ASTM FERRITE GRAIN SIZE NUMBERING SYSTEM.
References Cited (Backward Citations)
US2679454A
Cited
GB808556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |