Patent US2678987A successfully refreshed from Google Patents.
US2678987A
Expired / Lapsed
US
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Apparatus for welding on upright surfaces
Assignee: Chicago Bridge and Iron Co
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Filing: 1950-05-29
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Granted: 1954-05-18
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Expires: 1970-05-29
Abstract
No abstract record available.
Inventors
- 👤 Hyrum M Talley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:15
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/0206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1889319A
Cited
US2071246A
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US2390560A
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US2423190A
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US2460914A
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US2434481A
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US2529812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |