US2602738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-temperature steel
Assignee: Armco Inc
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Filing: 1950-01-30
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Granted: 1952-07-08
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Expires: 1970-01-30
Abstract
No abstract record available.
Inventors
- 👤 Paul A Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:44
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
AUSTENITIC STAINLESS STEEL HAVING A HARDNESS EXCEEDING 145 BRINELL AT A TEMPERATURE OF 1400* F. AND SUBSTANTIAL RESISTANCE TO CORROSION IN THE PRESENCE OF LEADED FUEL COMBUSTION PRODUCTS, AND CONTAINING ABOUT .08% TO 1.5% NICKEL, 7% TO 11% 23% CHROMIUM, 2% TO .40* NITROGEN, SILICON NOT MANGANESE, .06* TO .40% NITROGEN, SILICON NOT EXCEEDING 0.15%, 0.04% TO 0.20% SULPHUR, AND THE REMAINDER SUBSTANTIALLY ALL IRON.
Claim 2
Dependent Claim
65 words
AUSTENITIC STAINLESS STEEL HAVING A HARDNESS EXCEEDING 145 BRINELL AT A TEMPERATURE OF 1400* F. AND SUBSTANTIAL RESISTANCE TO CORROSION IN THE PRESENCE OF LEADED FUEL COMBUSTION PRODUCTS, AND CONTAINING ABOUT .08% TO 1.5% NICKEL, 7% TO 11% 23% CHROMIUM, 2% TO .40* NITROGEN, SILICON NOT MANGANESE, .06* TO .40% NITROGEN, SILICON NOT EXCEEDING 0.15%, 0.04% TO 0.20% SULPHUR, AND THE 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) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |