US4054447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steel resistant to intergranular stress corrosion cracking
Assignee: Individual
•
Filing: 1976-02-26
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Granted: 1977-10-18
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Expires: 1996-02-26
Abstract
Abstract A steel resistant to intergranular stress corrosion cracking having the composition: C up to 0.20%, Si 0.05 - 0.80%, Mn 0.30 - 1.50%, P up to 0.03%, S up to 0.03%, Al (sol. Al) 0.05 - 0.25%, Zr 0.03 - 0.20%, the balance being iron and unavoidable impurities. Another intergranular stress corrosion cracking resisting steel is disclosed which contains one or both of 0.10 - 0.30% Cr and 0.10 - 0.50% Ni in addition to the composition of the first-mentioned steel.
Inventors
- 👤 Gennosuke Tenmyo
- 👤 Masayuki Tanimura
- 👤 Toshio Nakazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:21
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/14; C22C38/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
48 words
A steel resistant to intergranular stress corrosion cracking consisting essentially of up to 0.20% C, 0.05 - 0.80% Si, 0.30 - 1.50% Mn, up to 0.03% P, up to 0.03% S, 0.05 - 0.25% Al (Sol. Al), 0.03 - 0.20% Zr, the balance being iron and unavoidable impurities.
Claim 2
Dependent Claim
48 words
A steel resistant to intergranular stress corrosion cracking consisting essentially of up to 0.20% C, 0.05 - 0.80% Si, 0.30 - 1.50% Mn, up to 0.03% P, up to 0.03% S, 0.05 - 0.25% Al (Sol. Al), 0.03 - 0.20% Zr, the balance being iron and unavoidable impurities.
Claim 3
Dependent Claim
22 words
A steel as defined in claim 1 further containing at least one of 0.10 - 0.30% Cr and 0.10 - 0.50% Ni.
References Cited (Backward Citations)
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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) | 1980-10-17 | 1981-04-18 | 1981-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-17 | 1985-04-18 | 1985-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-17 | 1989-04-18 | 1989-10-18 | $7700.00 | Window Closed / Lapsed |