Patent US2518222A successfully refreshed from Google Patents.
US2518222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric control system
Assignee: Babcock and Wilcox Co
•
Filing: 1945-01-26
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Granted: 1950-08-08
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Expires: 1965-01-26
Abstract
No abstract record available.
Inventors
- 👤 Otis R Carpenter
- 👤 Jr Frank W Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:21
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/12; B23K9/124; B23K9/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2175017A
Cited
US2175009A
Cited
US2329127A
Cited
US2260510A
Cited
US2288295A
Cited
US2348259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |