US84411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved screw-tap
Assignee: —
•
Filing: —
•
Granted: 1868-11-24
•
Expires: 1885-11-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:10
CPC Classifications
B; B23; B23G; B23G5/00; B23G5/02; B23G5/06; B23G2210/00; B23G2210/41; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/904; Y10T408/9046
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) | 1871-11-24 | 1872-05-25 | 1872-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1875-11-24 | 1876-05-25 | 1876-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1879-11-24 | 1880-05-25 | 1880-11-24 | $7700.00 | Window Closed / Lapsed |