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US3607246A
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Ferritic stainless steel
Assignee: Allegheny Ludlum Corp
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Filing: 1969-02-26
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Granted: 1971-09-21
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Expires: 1989-02-26
Abstract
Abstract A ferritic-type stainless steel suitable for manufacture into sheet and strip form that can be used for production operations involving stamping, punching, piercing, blanking and drawing by high-speed press production.
Inventors
- 👤 Wesley Kalita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:48
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
14 words
A ferritic stainless steel according to claim 1 having 10.7 to 11.3 percent chromium.
Claim 2
Dependent Claim
14 words
A ferritic stainless steel according to claim 1 having 0.2 to 0.5 percent silicon.
Claim 3
Dependent Claim
14 words
A ferritic stainless steel according to claim 1 having 0.05 to 0.1 percent titanium.
Claim 4
Dependent Claim
14 words
A ferritic stainless steel according to claim 1 having 0.3 to 0.5 percent manganese.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |