US189190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in shaft-couplings
Assignee: —
•
Filing: —
•
Granted: 1877-04-03
•
Expires: 1894-04-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:35
CPC Classifications
H; H01; H01R; H01R4/00; H01R4/28; H01R4/50; H01R4/52; Y; Y10; Y10T; Y10T403/00; Y10T403/57; Y10T403/5721
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) | 1880-04-02 | 1880-10-02 | 1881-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1884-04-02 | 1884-10-02 | 1885-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1888-04-02 | 1888-10-02 | 1889-04-03 | $7700.00 | Window Closed / Lapsed |