US2787699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of butt welding fully austenitic stainless steel alloy tubes
Assignee: Babcock and Wilcox Co
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Filing: 1954-04-05
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Granted: 1957-04-02
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Expires: 1974-04-05
Abstract
No abstract record available.
Inventors
- 👤 Nicholas C Jessen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:55
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3053; B23K35/308; B23K35/3086
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A METHOD OF BUTT WELDING FULLY AUSTENITIC CR-NI ALLOY STEEL TUBES COMPRISING THE STEPS OF BUILDING UP, ON THE ENDS OF THE TUBES TO BE WELD UNITES, FUSION WELD DEPOSITS OF PARTIALLY FERRITIC CR-NI ALLOY STEEL; WELD UNITING THE BUILD UP ENDS OF AXIALLY ALIGNED TUBES WITH A
Claim 2
Independent Claim
48 words
A METHOD OF BUTT WELDING FULLY AUSTENITIC CR-NI ALLOY STEEL TUBES COMPRISING THE STEPS OF BUILDING UP, ON THE ENDS OF THE TUBES TO BE WELD UNITES, FUSION WELD DEPOSITS OF PARTIALLY FERRITIC CR-NI ALLOY STEEL; WELD UNITING THE BUILD UP ENDS OF AXIALLY ALIGNED TUBES WITH A
References Cited (Backward Citations)
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US2179774A
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US2111790A
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US2233455A
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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) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |