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US86674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in counter-sink
Assignee: —
•
Filing: —
•
Granted: 1869-02-09
•
Expires: 1886-02-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:21
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/113; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/896; Y10T408/8973
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) | 1872-02-09 | 1872-08-10 | 1873-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1876-02-09 | 1876-08-10 | 1877-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1880-02-09 | 1880-08-10 | 1881-02-09 | $7700.00 | Window Closed / Lapsed |