US133620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in shaft-couplings
Assignee: —
•
Filing: —
•
Granted: 1872-12-03
•
Expires: 1889-12-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:39
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32631
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) | 1875-12-03 | 1876-06-03 | 1876-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1879-12-03 | 1880-06-03 | 1880-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1883-12-03 | 1884-06-03 | 1884-12-03 | $7700.00 | Window Closed / Lapsed |