US521269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core-attracting solenoid
Assignee: Individual
•
Filing: 1892-04-26
•
Granted: 1894-06-12
•
Expires: 1912-04-26
Abstract
No abstract record available.
Inventors
- 👤 Wenzel Robert Michl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:30
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1607
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) | 1897-06-11 | 1897-12-11 | 1898-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1901-06-12 | 1901-12-12 | 1902-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1905-06-12 | 1905-12-12 | 1906-06-13 | $7700.00 | Window Closed / Lapsed |