US1672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for drilling or boring rock and other substances
Assignee: —
•
Filing: —
•
Granted: 1840-07-03
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Expires: 1857-07-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:38
CPC Classifications
E; E04; E04H; E04H17/00; E04H17/26; E04H17/261; E04H17/263; E21; E21B; E21B7/00; E21B7/02
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) | 1843-07-03 | 1844-01-02 | 1844-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1847-07-03 | 1848-01-02 | 1848-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1851-07-03 | 1852-01-02 | 1852-07-03 | $7700.00 | Window Closed / Lapsed |