Patent US112972A successfully refreshed from Google Patents.
US112972A
Expired / Lapsed
US
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Improvement in shaft-couplings
Assignee: —
•
Filing: —
•
Granted: 1871-03-21
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Expires: 1888-03-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:28
CPC Classifications
B; B65; B65G; B65G21/00; B65G21/20; B65G21/2045; B65G21/2063; B65G21/2072; F; F16; F16B; F16B2/00; F16B2/02; F16B2/04; Y; Y10; Y10T; Y10T403/00; Y10T403/57; Y10T403/5741
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) | 1874-03-20 | 1874-09-19 | 1875-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1878-03-20 | 1878-09-19 | 1879-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1882-03-20 | 1882-09-19 | 1883-03-21 | $7700.00 | Window Closed / Lapsed |