Patent US140370A successfully refreshed from Google Patents.
US140370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in boring-bits
Assignee: —
•
Filing: —
•
Granted: 1873-07-01
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Expires: 1890-07-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:07
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26
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) | 1876-06-30 | 1876-12-30 | 1877-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1880-06-30 | 1880-12-30 | 1881-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1884-06-30 | 1884-12-30 | 1885-07-01 | $7700.00 | Window Closed / Lapsed |