Patent US2863981A successfully refreshed from Google Patents.
US2863981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal arc welding
Assignee: Union Carbide Corp
•
Filing: 1954-09-01
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Granted: 1958-12-09
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Expires: 1974-09-01
Abstract
No abstract record available.
Inventors
- 👤 Kenneth L Thomas
- 👤 Robert J Wickham
- 👤 George M Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:40
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/16; B23K9/173
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
14 words
30% SI, TRACE TO 0.015% S, TRACE TO 0.04% P, AND THE BALANCE IRON.
References Cited (Backward Citations)
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US1468937A
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US2239465A
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US2504867A
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US2504868A
Cited
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US2576793A
Cited
GB736241A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |