US757950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling and automatic centering device.
Assignee: Individual
•
Filing: 1903-11-18
•
Granted: 1904-04-19
•
Expires: 1923-11-18
Abstract
No abstract record available.
Inventors
- 👤 James J Mcelwain
- 👤 Elmer A Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:35
CPC Classifications
B; B23; B23B; B23B47/00; B23B47/28; B23B47/284; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/559; Y10T408/564; Y10T408/5653
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1907-04-19 | 1907-10-19 | 1908-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-04-19 | 1911-10-19 | 1912-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-04-19 | 1915-10-19 | 1916-04-19 | $7700.00 | Window Closed / Lapsed |