US1365569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic apparatus
Assignee: —
•
Filing: —
•
Granted: 1921-01-11
•
Expires: 1938-01-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:18
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/24; H01F27/245; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49078
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1924-01-11 | 1924-07-12 | 1925-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-01-11 | 1928-07-12 | 1929-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-01-11 | 1932-07-12 | 1933-01-11 | $7700.00 | Window Closed / Lapsed |