US2542220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferritic alloy
Assignee: NL Industries Inc
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Filing: 1948-10-05
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Granted: 1951-02-20
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Expires: 1968-10-05
Abstract
No abstract record available.
Inventors
- 👤 Stephen F Urban
- 👤 George F Comstock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:27
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/002; C22C38/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
AN ALLOY OF FERRITIC STRUCTURE RESISTANT TO STRESS FOR EXTENDED PERIODS AT RELATIVELY HIGH TEMPERATURES COMPRISING 0.1 TO 1% TITANIUM, LESS THAN 0.1% CARBON, AND 0.01% TO 0.10% BORON, THE REMAINDER BEING ESSENTIALLY IRON.
Claim 2
Dependent Claim
34 words
AN ALLOY OF FERRITIC STRUCTURE RESISTANT TO STRESS FOR EXTENDED PERIODS AT RELATIVELY HIGH TEMPERATURES COMPRISING 0.1 TO 1% TITANIUM, LESS THAN 0.1% CARBON, AND 0.01% TO 0.10% BORON, THE REMAINDER BEING ESSENTIALLY 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) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |