US3574602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High tension tough steel having excellent property resisting to delayed rupture
Assignee: Yawata Iron and Steel Co Ltd
•
Filing: 1967-12-15
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Granted: 1971-04-13
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Expires: 1987-12-15
Abstract
Abstract THIS INVENTION RELATES TO A HIGH TENSION TOUGH STEEL HAVING EXCELLENT PROPERTY RESISTING TO DELAYED RUPTURE, CONSISTING OF 0.05 TO 0.80% C, 0.05 TO 2.00% SI, 0.30 TO 2.00% MN, 0.05 TO 6.00% CR 0.01 TO 0.30% TR, 0.005 TO ELEMENT SELECTED FROM THE GROUP CONSISTING OF SN, SB AND AS, FROM THE GROUP CONSISTING OF NB+TA, W, HF AND PD AND FURTHER FROM THE GROUP CONSISTING OF MO, NI, V AND CU, BALANCE BEING FE AND IMPURITIES.
Inventors
- 👤 Hisashi Gondo
- 👤 Isao Kimura
- 👤 Tuneyasu Watanabe
- 👤 Mitsuo Honda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:51
CPC Classifications
H; H01; H01J; H01J40/00; H01J40/02; C; C22; C22C; C22C38/00; C22C38/18; C22C38/32
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |