US928516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetically-operated apparatus.
Assignee: Westinghouse Electric Corp
•
Filing: 1906-04-04
•
Granted: 1909-07-20
•
Expires: 1926-04-04
Abstract
No abstract record available.
Inventors
- 👤 Rudolf E Hellmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:00
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/14; H01F7/145
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) | 1912-07-19 | 1913-01-18 | 1913-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-07-19 | 1917-01-18 | 1917-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-07-19 | 1921-01-18 | 1921-07-20 | $7700.00 | Window Closed / Lapsed |