US2549323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic electromagnetic switch
Assignee: Individual
•
Filing: 1948-11-15
•
Granted: 1951-04-17
•
Expires: 1968-11-15
Abstract
No abstract record available.
Inventors
- 👤 Mcmullen Elvin
- 👤 Chester A Mcmullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:03
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/64; H01H1/66; H01H71/00; H01H71/10; H01H71/12; H01H71/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US827269A
Cited
US1426993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |