US803911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock-cutting drill-bit.
Assignee: Individual
•
Filing: 1903-09-02
•
Granted: 1905-11-07
•
Expires: 1923-09-02
Abstract
No abstract record available.
Inventors
- 👤 John George Leyner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:03
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/046; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53909; Y10T29/5393
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) | 1908-11-06 | 1909-05-08 | 1909-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1912-11-06 | 1913-05-08 | 1913-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1916-11-06 | 1917-05-08 | 1917-11-07 | $7700.00 | Window Closed / Lapsed |