US1403711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill
Assignee: Individual
•
Filing: 1921-05-14
•
Granted: 1922-01-17
•
Expires: 1941-05-14
Abstract
No abstract record available.
Inventors
- 👤 William K Schaefer
- 👤 Henry G Greer
- 👤 Elzadore S Mccullough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:33
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/44; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17291; Y10T279/17299
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) | 1925-01-16 | 1925-07-18 | 1926-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-01-16 | 1929-07-18 | 1930-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-01-16 | 1933-07-18 | 1934-01-17 | $7700.00 | Window Closed / Lapsed |