Patent US800894A successfully refreshed from Google Patents.
US800894A
Expired / Lapsed
US
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Drilling apparatus.
Assignee: Individual
•
Filing: 1904-10-19
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Granted: 1905-10-03
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Expires: 1924-10-19
Abstract
No abstract record available.
Inventors
- 👤 Stephen W Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:36
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/04; B23B51/0486; Y; Y10; Y10S; Y10S415/00; Y10S415/903; Y10S82/00; Y10S82/901; Y10T; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/455; Y10T408/60; Y10T408/62; Y10T408/89; Y10T408/905
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) | 1908-10-02 | 1909-04-03 | 1909-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1912-10-02 | 1913-04-03 | 1913-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1916-10-02 | 1917-04-03 | 1917-10-03 | $7700.00 | Window Closed / Lapsed |