US2877390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnet
Assignee: Individual
•
Filing: 1953-04-02
•
Granted: 1959-03-10
•
Expires: 1973-04-02
Abstract
No abstract record available.
Inventors
- 👤 Trombetta Panfilo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:07
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/10; H01F7/12; H01F7/1205
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1436639A
Cited
US1482212A
Cited
US1015992A
Cited
US1700228A
Cited
US1981534A
Cited
US2151213A
Cited
US2400344A
Cited
US2468052A
Cited
US2459078A
Cited
US2510298A
Cited
US2665397A
Cited
US2715199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |