US235734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underground telegraph
Assignee: —
•
Filing: —
•
Granted: 1880-12-21
•
Expires: 1897-12-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:54
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/28; H01B7/282; H01B7/285; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49885
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) | 1883-12-21 | 1884-06-21 | 1884-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1887-12-21 | 1888-06-21 | 1888-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1891-12-21 | 1892-06-21 | 1892-12-21 | $7700.00 | Window Closed / Lapsed |