US172351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in wood-screws
Assignee: —
•
Filing: —
•
Granted: 1876-01-18
•
Expires: 1893-01-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:28
CPC Classifications
F; F16; F16B; F16B23/00; F16B23/0007; F16B23/003; Y; Y10; Y10S; Y10S411/00; Y10S411/919
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1879-01-17 | 1879-07-19 | 1880-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1883-01-17 | 1883-07-19 | 1884-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1887-01-17 | 1887-07-19 | 1888-01-18 | $7700.00 | Window Closed / Lapsed |