US2613303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe welding machine
Assignee: CAL METAL CORP
•
Filing: 1949-03-05
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Granted: 1952-10-07
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Expires: 1969-03-05
Abstract
No abstract record available.
Inventors
- 👤 Charles A Babbitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:07
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/08; B23K11/087; B23K11/0873; B23K9/00; B23K9/02; B23K9/025; B23K9/0253
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1661970A
Cited
US1874399A
Cited
DE616710C
Cited
US1914518A
Cited
US1976343A
Cited
US2139211A
Cited
US2322221A
Cited
US2385109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |