US2750283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stainless steels containing boron
Assignee: Armco Inc
•
Filing: 1953-05-27
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Granted: 1956-06-12
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Expires: 1973-05-27
Abstract
No abstract record available.
Inventors
- 👤 Donald L Loveless
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:45
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
ALLOY STEEL INGOTS OF AT LEAST ABOUT 16" X 35" SIZE AND OF IMPROVED HOT-ROLLING CHARACTERISTICS CONTAINING CHROMIUM UP TO ABOUT 35%, NICKEL UP TO ABOUT 35%, UP TO ABOUT 20% MANGANESE, UP TO ABOUT 5% SILICON, UP TO ABOUT 50% COBALT, UP TO ABOUT 10% MOLYBDENUM, UP TO ABOUT 10% COPPER, UP TO ABOUT 5% ALUMINUM, UP TO ABOUT 5% COLUMBIUM, TANTALUM, VANADIUM, ZIRCONIUM AND TITANIUM, THE TOTAL ALLOY CONTENT BEING AT LEAST 45%, ABOUT 0.00005% TO 0.008% BORON, AND REMAINDER SUBSTANTIALLY ALL IRON.
Claim 2
Dependent Claim
85 words
ALLOY STEEL INGOTS OF AT LEAST ABOUT 16" X 35" SIZE AND OF IMPROVED HOT-ROLLING CHARACTERISTICS CONTAINING CHROMIUM UP TO ABOUT 35%, NICKEL UP TO ABOUT 35%, UP TO ABOUT 20% MANGANESE, UP TO ABOUT 5% SILICON, UP TO ABOUT 50% COBALT, UP TO ABOUT 10% MOLYBDENUM, UP TO ABOUT 10% COPPER, UP TO ABOUT 5% ALUMINUM, UP TO ABOUT 5% COLUMBIUM, TANTALUM, VANADIUM, ZIRCONIUM AND TITANIUM, THE TOTAL ALLOY CONTENT BEING AT LEAST 45%, ABOUT 0.00005% TO 0.008% BORON, AND REMAINDER SUBSTANTIALLY ALL IRON.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |