US2473859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for welding structural cages
Assignee: American Pipe and Construction Co
•
Filing: 1946-01-02
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Granted: 1949-06-21
•
Expires: 1966-01-02
Abstract
No abstract record available.
Inventors
- 👤 Adolf G Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:14
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/002; B23K11/008; B21; B21F; B21F27/00; B21F27/12; B21F27/121; B21F27/122; B21F27/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2046460A
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US2137257A
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US2140488A
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US2390174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |