US2839391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromium-manganese alloy and products
Assignee: Armco Inc
•
Filing: 1954-10-21
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Granted: 1958-06-17
•
Expires: 1974-10-21
Abstract
No abstract record available.
Inventors
- 👤 Donald L Loveless
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:14
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
AUSTENITIC ALLOY STEEL OF IMPROVED HOT-ROLLING CHARACTERISTICS ESSENTIALLY COMPRISING 12-30% CHROMIUM, 4-20% MANGANESE, UP TO 35% NICKEL, UP TO 1.5% CARBON, ABOUT .06% TO .60% NITROGEN. 0.00005 TO 0.005% BORON AND REMAINDER SUBSTANTIALLY ALL IRON.
Claim 2
Dependent Claim
35 words
AUSTENITIC ALLOY STEEL OF IMPROVED HOT-ROLLING CHARACTERISTICS ESSENTIALLY COMPRISING 12-30% CHROMIUM, 4-20% MANGANESE, UP TO 35% NICKEL, UP TO 1.5% CARBON, ABOUT .06% TO .60% NITROGEN. 0.00005 TO 0.005% BORON AND REMAINDER SUBSTANTIALLY ALL IRON.
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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |