US2110397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill
Assignee: Individual
•
Filing: 1937-01-29
•
Granted: 1938-03-08
•
Expires: 1957-01-29
Abstract
No abstract record available.
Inventors
- 👤 Kangas Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:27
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/046; F; F16; F16B; F16B2200/00; F16B2200/10; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17761; Y10T403/00; Y10T403/60; Y10T403/70; Y10T403/7018; Y10T403/7075; Y10T403/7077; Y10T403/7079
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) | 1941-03-07 | 1941-09-06 | 1942-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-03-07 | 1945-09-06 | 1946-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-03-07 | 1949-09-06 | 1950-03-08 | $7700.00 | Window Closed / Lapsed |