Patent US3069257A successfully refreshed from Google Patents.
US3069257A
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Alloy steel and method
Assignee: Armco Inc
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Filing: 1960-06-02
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Granted: 1962-12-18
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Expires: 1980-06-02
Abstract
No abstract record available.
Inventors
- 👤 Jr William C Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:04
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/001; C22C38/18; C22C38/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A STAINLESS STEEL ESSENTIALLY CONSISTING OF .23% TO .28% CARBON, .15% MAX. MANGANESE, .03% MAX. PHOSPHORUS, .03% MAX. SULPHUR, .35% MAX. SILICON, 11.0% TO 12.0% CHROMIUM, .15% MAX. NICKEL, 1.25% TO 1.75% MOLYBDENUM, 1.0% TO 1.5% TUNGSTEN, .30% TO .45% VANADIUM, .08% TO .12% NITROGEN, .20% TO .40% COLUMBIUM, WITH THE SUM OF THE MANGANESE AND NICKEL CONTENTS NOT EXCEEDING .25%, AND REMAINDER SUBSTANTIALLY ALL IRON.
Claim 2
Dependent Claim
66 words
A STAINLESS STEEL ESSENTIALLY CONSISTING OF .23% TO .28% CARBON, .15% MAX. MANGANESE, .03% MAX. PHOSPHORUS, .03% MAX. SULPHUR, .35% MAX. SILICON, 11.0% TO 12.0% CHROMIUM, .15% MAX. NICKEL, 1.25% TO 1.75% MOLYBDENUM, 1.0% TO 1.5% TUNGSTEN, .30% TO .45% VANADIUM, .08% TO .12% NITROGEN, .20% TO .40% COLUMBIUM, WITH THE SUM OF THE MANGANESE AND NICKEL CONTENTS NOT EXCEEDING .25%, AND REMAINDER SUBSTANTIALLY ALL IRON.
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) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |