Patent US4605927A successfully refreshed from Google Patents.
US550783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill for boring curved holes
Assignee: —
•
Filing: —
•
Granted: 1895-12-03
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Expires: 1912-12-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:43
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/06; E21B7/068; Y; Y10; Y10T; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/65; Y10T408/665; Y10T74/00; Y10T74/20; Y10T74/20396; Y10T74/20474
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) | 1898-12-02 | 1899-06-03 | 1899-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1902-12-03 | 1903-06-04 | 1903-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1906-12-03 | 1907-06-04 | 1907-12-04 | $7700.00 | Window Closed / Lapsed |