US650973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical system for water-tight doors.
Assignee: Individual
•
Filing: 1899-12-23
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Granted: 1900-06-05
•
Expires: 1919-12-23
Abstract
No abstract record available.
Inventors
- 👤 George H Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:04
CPC Classifications
E; E05; E05B; E05B77/00; E05B77/46; E05B77/48; E05Y; E05Y2900/00; E05Y2900/50; E05Y2900/53; E05Y2900/55
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) | 1903-06-05 | 1903-12-05 | 1904-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-06-05 | 1907-12-05 | 1908-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-06-05 | 1911-12-05 | 1912-06-05 | $7700.00 | Window Closed / Lapsed |