Patent US181589A successfully refreshed from Google Patents.
US181589A
Expired / Lapsed
US
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Improvement in nut-locks
Assignee: —
•
Filing: —
•
Granted: 1876-08-29
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Expires: 1893-08-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:36
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/36; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/935
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) | 1879-08-29 | 1880-02-28 | 1880-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1883-08-29 | 1884-02-28 | 1884-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1887-08-29 | 1888-02-28 | 1888-08-29 | $7700.00 | Window Closed / Lapsed |