US2564004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural steel
Assignee: Inland Steel Co
•
Filing: 1949-05-17
•
Granted: 1951-08-14
•
Expires: 1969-05-17
Abstract
No abstract record available.
Inventors
- 👤 James W Halley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:48
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/06; C22; C22C; C22C38/00; C22C38/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A SEMI-KILLED STEEL CHARACTERIZED BY ITS HIGH RESISTANCE TO BRITTLE FRACTURE AND CONTAINING NOT MORE THAN ABOUT .35% CARBON AND FROM ABOUT .005% TO ABOUT .75% ZIRCONIUM AS ZIRCONIUM OXIDE.
Claim 2
Dependent Claim
30 words
A SEMI-KILLED STEEL CHARACTERIZED BY ITS HIGH RESISTANCE TO BRITTLE FRACTURE AND CONTAINING NOT MORE THAN ABOUT .35% CARBON AND FROM ABOUT .005% TO ABOUT .75% ZIRCONIUM AS ZIRCONIUM OXIDE.
References Cited (Backward Citations)
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Cited
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US1550490A
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Cited
US2069758A
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US2046168A
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GB477982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |