Patent US2519216A successfully refreshed from Google Patents.
US2736649A
Expired / Lapsed
US
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Ferritic stainless steel
Assignee: United States Steel Corp
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Filing: 1953-12-04
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Granted: 1956-02-28
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Expires: 1973-12-04
Abstract
No abstract record available.
Inventors
- 👤 Freeman J Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:45
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/004; C22C38/06; C21; C21D; C21D6/00; C21D6/002; C22C38/001; C22C38/02; C22C38/04; C22C38/18; C22C38/22; C22C38/26; C22C38/28; C22C38/40; C22C38/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A FERRITIC STAINLESS STEEL CONTAINING 9 TO 11% CHROMIUM, .03% MAXIMUM CARBON TITANIUM AT LEAST 10 TIMES CARBON BUT NOT OVER 1%, .02 TO .30% ALUMINUM AND .10 TO 1.00% MANGANESE, BALANCE IRON EXCEPT FOR RESIDUAL IMPURITIES AND ELEMENTS IN AMOUNTS THAT DO NOT ADVERSELY AFFECT THE PROPERTIES.
Claim 2
Dependent Claim
48 words
A FERRITIC STAINLESS STEEL CONTAINING 9 TO 11% CHROMIUM, .03% MAXIMUM CARBON TITANIUM AT LEAST 10 TIMES CARBON BUT NOT OVER 1%, .02 TO .30% ALUMINUM AND .10 TO 1.00% MANGANESE, BALANCE IRON EXCEPT FOR RESIDUAL IMPURITIES AND ELEMENTS IN AMOUNTS THAT DO NOT ADVERSELY AFFECT THE PROPERTIES.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |