Patent US2502519A successfully refreshed from Google Patents.
US2502519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switch
Assignee: Individual
•
Filing: 1947-02-17
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Granted: 1950-04-04
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Expires: 1967-02-17
Abstract
No abstract record available.
Inventors
- 👤 Grey Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:25
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/34; H05B3/342; H05B2203/00; H05B2203/002; H05B2203/003; H05B2203/014
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US723797A
Cited
US1544446A
Cited
US1698703A
Cited
US1740535A
Cited
US1837117A
Cited
US2138745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |