US3552950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature corrosion resistant fe-g-ni-mn alloy
Assignee: Simonds Saw and Steel Co
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Filing: 1967-06-14
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Granted: 1971-01-05
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Expires: 1987-06-14
Abstract
Abstract AGE HARDENABLE, AUSTENITIC ALLOY CHARACTERIZED BY HIGH ELEVATED AND AMBIENT TEMPERATURE HARDNESS, STRENGTH AND CORROSION RESISTANCE, PARTICULARLY ADAPTED FOR INTERNAL COMBUSTION ENGINE VALVES, AND CONSISTING ESSENTIALLY OF ABOUT; 20-70% NICKEL, 4-20% MAGANESE, 12-40% CHROMIUM, UP TO 0.5% CARBON, UP TO 0.3% NITROGEN, UP TO 0.6% SILICON, UP TO 5% MOLYBDENUM, UP TO 6% TITANIUM, UP TO 4% EACH OF ALUMINUM AND COPPER, UP TO 0.2% BORON, BALANCE SUBSTANTIALLY IRON.
Inventors
- 👤 Gene R Rundell
- 👤 Alvin E Nehrenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:34
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/052; C22C38/00; C22C38/18; C22C38/40; C22C38/58
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |