US1222431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic apparatus.
Assignee: Hitachi Rail STS USA Inc
•
Filing: 1914-02-19
•
Granted: 1917-04-10
•
Expires: 1934-02-19
Abstract
No abstract record available.
Inventors
- 👤 Daniel J Mccarthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:04
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1607
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1920-04-09 | 1920-10-09 | 1921-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-04-09 | 1924-10-09 | 1925-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-04-09 | 1928-10-09 | 1929-04-10 | $7700.00 | Window Closed / Lapsed |