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US3824096A
Expired / Lapsed
US
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Manganese-nickel-aluminum-copper-molybdenum system age-hardenable steel for plastic molds
Assignee: Daido Steel Co Ltd
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Filing: 1972-06-21
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Granted: 1974-07-16
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Expires: 1992-06-21
Abstract
Abstract THE DISCLOSED STEELS FOR USE AS MATERIALS FOR PLASTIC MOLDS CONSIST ESSENTIALLY OF 0.05-0.18% C, 0.15-1.0% SI, 1.0-2% MN, 2.5-3.5% NI, 0.5-1.5% AI, 0.7-1.7% CU, 0.1-0.4% MO AND THE BALANCE, IRON AND ARE AGE-HARDENABLE AT ABOUT 500* C. FOR ABOUT FIVE HOURS AFTER BUILD-UP WELDING. TO IMPROVE THE MACHINABILITY, TOUGHNESS AND GRAIN REFINING PROPERTY, THE STEELS MAY BE ADDED, FOR EXAMPLE WITH UP TO 0.3% S, UP TO 2.5% CR AND UP TO 2.5% CR AND UP TO RESPCTIVELY.
Inventors
- 👤 C Asada
- 👤 T Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:26
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/08
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |