US2635044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardenable stainless steel alloy
Assignee: COOPER ALLOY FOUNDRY CO
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Filing: 1950-07-11
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Granted: 1953-04-14
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Expires: 1970-07-11
Abstract
No abstract record available.
Inventors
- 👤 Norman S Mott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:09
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PRECIPITATION HARDENABLE ALLOY OF THE TYPE KNOWN AS 18 AND 8 STAINLESS STEEL WITH THE USUAL RANGE OF FROM 17% TO 21% CHROMIUM AND 7% TO 14% NICKEL, SAID ALLOY HAVING SILICON IN A RANGE OF FROM 2% TO 4% MOLYBDENUM IN A RANGE OF FROM 1.5% TO 4%, BERYLLIUM IN A RANGE OF FROM 0.05% TO 0.02%, THE REMAINDER BEING ESSENTIALLY IRON WITH A CARBON CONTENT NOT EXCEEDING ABOUT 0.12%.
Claim 2
Dependent Claim
72 words
A PRECIPITATION HARDENABLE ALLOY OF THE TYPE KNOWN AS 18 AND 8 STAINLESS STEEL WITH THE USUAL RANGE OF FROM 17% TO 21% CHROMIUM AND 7% TO 14% NICKEL, SAID ALLOY HAVING SILICON IN A RANGE OF FROM 2% TO 4% MOLYBDENUM IN A RANGE OF FROM 1.5% TO 4%, BERYLLIUM IN A RANGE OF FROM 0.05% TO 0.02%, THE REMAINDER BEING ESSENTIALLY IRON WITH A CARBON CONTENT NOT EXCEEDING ABOUT 0.12%.
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) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |