US177731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in screw-taps
Assignee: —
•
Filing: —
•
Granted: 1876-05-23
•
Expires: 1893-05-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:33
CPC Classifications
B; B23; B23G; B23G5/00; B23G5/02; B23G5/06; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/904; Y10T408/9044; Y10T408/9045; Y10T408/9048
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) | 1879-05-23 | 1879-11-22 | 1880-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1883-05-23 | 1883-11-22 | 1884-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1887-05-23 | 1887-11-22 | 1888-05-23 | $7700.00 | Window Closed / Lapsed |