Patent US3740212A successfully refreshed from Google Patents.
US3740212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation resistant austenitic ductile nickel chromium iron
Assignee: Huntington Alloys Corp
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Filing: 1971-03-31
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Granted: 1973-06-19
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Expires: 1991-03-31
Abstract
Abstract DIRECTED TO ALLOYED DUCTILE IRONS HAVING IN THE AS-CAST CONDITION HIGH TEMPERATURE OXIDATTION RESISTANCE, AND USEFUL HIGH TEMPERATURE STRENGTH AND DIMEMSIONAL STABILITY DURING THERMAL CYCLING OR LONG TIME HOLDING AT HIGGH TEMPERATURES, WHICH CONTAIN ABOUT 1.6% TO 2.4% CARBON ABOUT 0.5% TO 1.5% MANGANESE, ABOUT 5% TO 6.5% DILICON, ABOUT 34% TO 40% NICKEL, ABOUT 1.5% TO 2.5% CHOROMIUM, AN EFFECTIVE AMOUNT OF A GRAPHITE SPHERODIZING AGENT AND THE BALANCE IRON.
Inventors
- 👤 N Church
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:54
CPC Classifications
C; C22; C22C; C22C37/00; C22C37/06; C22C37/08
Claims Analysis
Total Claims: 0
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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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |