Patent US2644747A successfully refreshed from Google Patents.
US2644747A
Expired / Lapsed
US
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Ferrous alloys
Assignee: LOUISE J EDER
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Filing: 1950-02-20
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Granted: 1953-07-07
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Expires: 1970-02-20
Abstract
No abstract record available.
Inventors
- 👤 Louis J Eder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:07
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/56; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3053; B23K35/306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A FERROUS ALLOY CONTAINING ABOUT 1% TO 3.75% CARBON, ABOUT 1% TO 3% CHROMIUM, ABOUT 1% TO 3% NICKEL, ABOUT .25% TO 4% MOLYBDENUM, ABOUT 1.5% SILICON, AND ABOUT .25% TO 3% VANADIUM, THE REMAINDER OF SAID ALLOY BEING IRON.
Claim 2
Dependent Claim
40 words
A FERROUS ALLOY CONTAINING ABOUT 1% TO 3.75% CARBON, ABOUT 1% TO 3% CHROMIUM, ABOUT 1% TO 3% NICKEL, ABOUT .25% TO 4% MOLYBDENUM, ABOUT 1.5% SILICON, AND ABOUT .25% TO 3% VANADIUM, THE REMAINDER OF SAID ALLOY BEING IRON.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |