US2089230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drill
Assignee: Individual
•
Filing: 1933-08-25
•
Granted: 1937-08-10
•
Expires: 1953-08-25
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Thowless
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:04
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/046; F; F16; F16B; F16B2200/00; F16B2200/69; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17564; Y10T403/00; Y10T403/57; Y10T403/5761; Y10T403/5766
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) | 1940-08-09 | 1941-02-08 | 1941-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-08-09 | 1945-02-08 | 1945-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-08-09 | 1949-02-08 | 1949-08-10 | $7700.00 | Window Closed / Lapsed |