Patent US3000770A successfully refreshed from Google Patents.
US3000770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Malleable white cast iron alloys
Assignee: EISENWERKE GELSENKIRCHEN AG FA
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Filing: 1954-11-15
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Granted: 1961-09-19
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Expires: 1974-11-15
Abstract
No abstract record available.
Inventors
- 👤 Wittmoser Adalbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:13
CPC Classifications
C; C22; C22C; C22C37/00; C22C37/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
AS A NEW COMPOSITION OF MATTER A MALLEABLEIZED WHITE HARD CAST IRON ALLOY ESSENTIALLY CONSISTING OF IRON, BETWEEN 2.5 AND ABOUT 3.5% BY WEIGHT OF CARBON SUBSTANTIALLY ALL IN THE FORM OF NODULAR GRAPHITE, BETWEEN 1.5-3.0% BY WEIGHT OF SILICON AND BETWEEN 0.3-1% BY WEIGHT OF SULFUR, SAID MALEABLEIZED ALLOY BEING SUBSTANTIALLY FREE OF CEMENTITE.
Claim 2
Dependent Claim
55 words
AS A NEW COMPOSITION OF MATTER A MALLEABLEIZED WHITE HARD CAST IRON ALLOY ESSENTIALLY CONSISTING OF IRON, BETWEEN 2.5 AND ABOUT 3.5% BY WEIGHT OF CARBON SUBSTANTIALLY ALL IN THE FORM OF NODULAR GRAPHITE, BETWEEN 1.5-3.0% BY WEIGHT OF SILICON AND BETWEEN 0.3-1% BY WEIGHT OF SULFUR, SAID MALEABLEIZED ALLOY BEING SUBSTANTIALLY FREE OF CEMENTITE.
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) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |