Patent US2770030A successfully refreshed from Google Patents.
US2770030A
Expired / Lapsed
US
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Welded joint between dissimilar metals
Assignee: Babcock and Wilcox Co
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Filing: 1950-06-15
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Granted: 1956-11-13
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Expires: 1970-06-15
Abstract
No abstract record available.
Inventors
- 👤 Otis R Carpenter
- 👤 Nicholas C Jessen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:04
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3053; B23K35/308; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12639; Y10T428/12646; Y10T428/12653
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A WELDED JOINT FOR USE UNDER CYCLICALLY VARIABLE ELEVATED TEMPERATURES AND PRESSURES, COMPRISING A CR-NI AUSTENITIC ALLOY STEEL MEMBER, A LOW ALLOY FERRITIC STEEL MEMBER OF THE CHROMIUM CONTAINING TYPE AND HAVING A CARBON CONTENT IN THE RANGE OF 0.10% TO 0.15%, AND A WELD DEPOSIT UNITING SAID MEMBERS AND CONSISTING OF A FERRITIC ALLOY STEEL HAVING SUBSTANTIALLY THE SAME COMPOSITION AS SAID FERRITIC STEEL ALLOY MEMBER BUT CONTAINING CARBON IN AN AMOUNT NOT EXCEEDING 0.05%.
Claim 2
Dependent Claim
76 words
A WELDED JOINT FOR USE UNDER CYCLICALLY VARIABLE ELEVATED TEMPERATURES AND PRESSURES, COMPRISING A CR-NI AUSTENITIC ALLOY STEEL MEMBER, A LOW ALLOY FERRITIC STEEL MEMBER OF THE CHROMIUM CONTAINING TYPE AND HAVING A CARBON CONTENT IN THE RANGE OF 0.10% TO 0.15%, AND A WELD DEPOSIT UNITING SAID MEMBERS AND CONSISTING OF A FERRITIC ALLOY STEEL HAVING SUBSTANTIALLY THE SAME COMPOSITION AS SAID FERRITIC STEEL ALLOY MEMBER BUT CONTAINING CARBON IN AN AMOUNT NOT EXCEEDING 0.05%.
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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) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |