US2853410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Martensitic steel for high temperature application
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1956-05-10
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Granted: 1958-09-23
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Expires: 1976-05-10
Abstract
No abstract record available.
Inventors
- 👤 Remus A Lula
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:28
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A MARTENSITIC STAINLESS STEEL FOR USE AT ELEVATED TEMPERATURES CONSISTING OF FROM ABOUT 0.15% TO 0.35% CARBON, FROM ABOUT 0.50% TO 2.0% MAGANESE, UP TO 0.75% SILICON, FROM ABOUT 10.50% TO 13.5% CHROMIUM, FROM ABOUT 0.30% TO 0.75% VANADIUM, FROM ABOUT 2.0% TO 3.5% TUGSTEN, FROM ABOUT 0.40% TO 0.75% MOLYBDENUM, FROM ABOUT 0.025% TO 0.10% NITROGEN, FROM ABOUT 0.3% TO 2.5% NICKEL, FROM ABOUT 0.2% TO 1.5% COLUMBIUM AND THE BALANCE IRON WITH BOT MORE THAN 1.5% OF INCIDENTAL IMPURITIES.
Claim 2
Dependent Claim
81 words
A MARTENSITIC STAINLESS STEEL FOR USE AT ELEVATED TEMPERATURES CONSISTING OF FROM ABOUT 0.15% TO 0.35% CARBON, FROM ABOUT 0.50% TO 2.0% MAGANESE, UP TO 0.75% SILICON, FROM ABOUT 10.50% TO 13.5% CHROMIUM, FROM ABOUT 0.30% TO 0.75% VANADIUM, FROM ABOUT 2.0% TO 3.5% TUGSTEN, FROM ABOUT 0.40% TO 0.75% MOLYBDENUM, FROM ABOUT 0.025% TO 0.10% NITROGEN, FROM ABOUT 0.3% TO 2.5% NICKEL, FROM ABOUT 0.2% TO 1.5% COLUMBIUM AND THE BALANCE IRON WITH BOT MORE THAN 1.5% OF INCIDENTAL 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) | 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 |