US2463907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for welding pipe
Assignee: Dresser Industries Inc
•
Filing: 1944-11-23
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Granted: 1949-03-08
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Expires: 1964-11-23
Abstract
No abstract record available.
Inventors
- 👤 Roger E Risley
- 👤 Paul B Scharf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:32
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/028; B23K9/0282; B23K9/0286
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2304976A
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US2320824A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |