US3787201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High tensile strength steel plate for cold-forming
Assignee: Nippon Steel Corp
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Filing: 1968-09-16
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Granted: 1974-01-22
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Expires: 1988-09-16
Abstract
Abstract A high tensile strength steel of low carbon Si-Cr series for use in frames of automobile which has a tensile strength of 50 to 65 kg/mm2 and is particularly excellent in the cold pressformability and fatigue strength, containing Cr and Si in more amounts than conventional high tensile strength steels of this kind and further Cu, Ti, Nb and V besides said elements to obtain above-mentioned characteristics, said steel plate being applicable as hot-rolled.
Inventors
- 👤 T Kikuma
- 👤 K Matsukura
- 👤 T Kawano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:38
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
10 words
A steel plate according to claim 1 produced as hot-rolled.
References Cited (Backward Citations)
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US2018267A
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US2006304A
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US2150342A
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US2182759A
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US2495854A
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US2449806A
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US3271138A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |