US2853379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High strength alloy steel for structural and pressure vessels
Assignee: Lukens Steel Co
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Filing: 1957-05-23
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Granted: 1958-09-23
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Expires: 1977-05-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Althouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:50
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A LOW ALLOY HIGH STRUCTRAL STRENGTH STEEL SUITABLE FOR STRUCTURAL OR PRESSURE VESSEL USES AND HAVING IMPROVED WELDABILITY, SAID STEEL CONTAINING 0.80-0.30 PERCENT CARBON, 0.90-1.40 PERCENT MANGANESE, UP TO 0.040 MAXIMUM PERCENT PHOSPHOROUS, UP TO 0.050 PERCENT MAXIMUM SULPHUR, 0.15-0.35 PERCENT SILICON, 1.25-1.75 PERCENT NICKEL, 0.05-0.13 PERCENT VANADIUM, 0.10-0.30 PERCENT MOLYBNDENUM, 0.005-0.05 PERCENT TITANIUM, UP TO 0.35 PERCENT MAXIMUM COPPER, 0.03-0.10 PERCENT ALUMINUM, AND THE REMAINDER IRON AND INCIDENTAL IMPURITIES.
Claim 2
Dependent Claim
70 words
A LOW ALLOY HIGH STRUCTRAL STRENGTH STEEL SUITABLE FOR STRUCTURAL OR PRESSURE VESSEL USES AND HAVING IMPROVED WELDABILITY, SAID STEEL CONTAINING 0.80-0.30 PERCENT CARBON, 0.90-1.40 PERCENT MANGANESE, UP TO 0.040 MAXIMUM PERCENT PHOSPHOROUS, UP TO 0.050 PERCENT MAXIMUM SULPHUR, 0.15-0.35 PERCENT SILICON, 1.25-1.75 PERCENT NICKEL, 0.05-0.13 PERCENT VANADIUM, 0.10-0.30 PERCENT MOLYBNDENUM, 0.005-0.05 PERCENT TITANIUM, UP TO 0.35 PERCENT MAXIMUM COPPER, 0.03-0.10 PERCENT ALUMINUM, AND THE REMAINDER IRON AND INCIDENTAL IMPURITIES.
References Cited (Backward Citations)
US2140237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |