US2575381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for continuous welding of pipes and tubes
Assignee: Youngstown Sheet and Tube Co
•
Filing: 1949-04-01
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Granted: 1951-11-20
•
Expires: 1969-04-01
Abstract
No abstract record available.
Inventors
- 👤 Irving A Colby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:00
CPC Classifications
B; B23; B23K; B23K13/00; B23K13/01; B23K13/02; B23K13/025; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49828
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |