US2883487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic device
Assignee: Westinghouse Electric Corp
•
Filing: 1957-01-31
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Granted: 1959-04-21
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Expires: 1977-01-31
Abstract
No abstract record available.
Inventors
- 👤 Charles W Spaulding
- 👤 Robert A Pelz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:18
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/30; H01H9/44; H01H9/443; H01H50/00; H01H50/16; H01H50/36; H01H50/42; H01H51/00; H01H51/02; H01H51/04; H01H51/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1298746A
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US1918232A
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US2467720A
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US2432899A
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US2539547A
Cited
US2542835A
Cited
US2550110A
Cited
US2594088A
Cited
US2679561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |