US3288600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low carbon, high strength alloy steel
Assignee: Armco Inc
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Filing: 1960-11-07
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Granted: 1966-11-29
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Expires: 1980-11-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Arthur M Johnsen
- 👤 Jr George E Kampschaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:52
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A HIGH STRENGTH, LOW CARBON ALLOY STEEL CONSISTING ESSENTIALLY OF: CARBON, SUBSTANTIALLY .08% TO .21%, CARBON, SUBSTANTIALLY .08% TO .21%, MANGANESE, SUBSTANTIALLY .20% TO .70%, PHOSPHORUS, .40% MAXIMUM, SULFUR, .05% MAXIMUM, SILICON, SUBSTANTIALLY .15% TO 1.0%, CHROMIUM, SUBSTANTIALLY 1.0% TO 2.5%, MOLYBDENUM, SUBSTANTIALLY .40% TO 1.0%, BORON, SUBSTANTIALLY .0015% TO .01%. SAID STEEL CONTAINING A MATERIAL SELECTED FROM A GROUP CONSISTING OF TITANIUM, VANADIUM, COLUMBIUM, AND COMBINATIONS THEREOF IN AN AMOUNT OF SUBSTANTIALLY .03% TO .15%, THE BALANCE BEING SUBSTANTIALLY ALL IRON WITH COMMERCIAL IMPURITIES.
Claim 2
Dependent Claim
85 words
A HIGH STRENGTH, LOW CARBON ALLOY STEEL CONSISTING ESSENTIALLY OF: CARBON, SUBSTANTIALLY .08% TO .21%, CARBON, SUBSTANTIALLY .08% TO .21%, MANGANESE, SUBSTANTIALLY .20% TO .70%, PHOSPHORUS, .40% MAXIMUM, SULFUR, .05% MAXIMUM, SILICON, SUBSTANTIALLY .15% TO 1.0%, CHROMIUM, SUBSTANTIALLY 1.0% TO 2.5%, MOLYBDENUM, SUBSTANTIALLY .40% TO 1.0%, BORON, SUBSTANTIALLY .0015% TO .01%. SAID STEEL CONTAINING A MATERIAL SELECTED FROM A GROUP CONSISTING OF TITANIUM, VANADIUM, COLUMBIUM, AND COMBINATIONS THEREOF IN AN AMOUNT OF SUBSTANTIALLY .03% TO .15%, THE BALANCE BEING SUBSTANTIALLY ALL IRON WITH COMMERCIAL IMPURITIES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |