US2862812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substantially nickel-free austenitic and corrosion resisting cr-mn-n steels
Assignee: Crucible Steel Company of America
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Filing: 1958-05-16
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Granted: 1958-12-02
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Expires: 1978-05-16
Abstract
No abstract record available.
Inventors
- 👤 Edward J Dulis
- 👤 Payson Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:04
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/001; C22C38/18; C22C38/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
AN ALLOY STEEL CONSISTING ESSENTIALLY OF ABOUT: 11 TO UNDER 14% MANGANESE, 14 TO 18% CHROMIUM, UP TO 2% COPPER, UP TO 3% SILICON, 0.15 TO 0.4% NITROGEN, UP TO 0.15% CARBON, THE MINIMUM CARBON PLUS NITROGEN CONTENT BEING RELATED TO THE CHROMIUM CONTENT IN ACCORDANCE WITH THE FOLLOWING EQUATION, PERCENT (C+N) MIN=0.075 (PERCENT CR-12.5)+0.1, BALANCE SUBSTANTIALLY IRON, SAID ALLOY BEING CHARACTERIZED BY AN WHOLLY AUSTENITIC STRUCTURE AS QUENCHED FROM 2300*F. AND BY GOOD CORROSION RESISTANCE TO ATMOSPHERIC EXPOSURE.
Claim 2
Dependent Claim
79 words
AN ALLOY STEEL CONSISTING ESSENTIALLY OF ABOUT: 11 TO UNDER 14% MANGANESE, 14 TO 18% CHROMIUM, UP TO 2% COPPER, UP TO 3% SILICON, 0.15 TO 0.4% NITROGEN, UP TO 0.15% CARBON, THE MINIMUM CARBON PLUS NITROGEN CONTENT BEING RELATED TO THE CHROMIUM CONTENT IN ACCORDANCE WITH THE FOLLOWING EQUATION, PERCENT (C+N) MIN=0.075 (PERCENT CR-12.5)+0.1, BALANCE SUBSTANTIALLY IRON, SAID ALLOY BEING CHARACTERIZED BY AN WHOLLY AUSTENITIC STRUCTURE AS QUENCHED FROM 2300*F. AND BY GOOD CORROSION RESISTANCE TO ATMOSPHERIC EXPOSURE.
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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |