US2440696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding mechanism
Assignee: Central Mine Equipment Co
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Filing: 1944-09-13
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Granted: 1948-05-04
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Expires: 1964-09-13
Abstract
No abstract record available.
Inventors
- 👤 James M Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:38
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/032; B23K9/0325
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) | 1951-05-04 | 1951-11-03 | 1952-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-04 | 1955-11-03 | 1956-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-04 | 1959-11-03 | 1960-05-04 | $7700.00 | Window Closed / Lapsed |