Patent US2019761A successfully refreshed from Google Patents.
US2019761A
Expired / Lapsed
US
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Rotary drilling machine
Assignee: PNEUMATIC TOOL Co
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Filing: 1933-05-31
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Granted: 1935-11-05
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Expires: 1953-05-31
Abstract
No abstract record available.
Inventors
- 👤 William J Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:49
CPC Classifications
E; E21; E21B; E21B3/00; E21B3/02; E21B3/022; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17411; Y10T279/17555
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) | 1938-11-04 | 1939-05-06 | 1939-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-04 | 1943-05-06 | 1943-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-04 | 1947-05-06 | 1947-11-05 | $7700.00 | Window Closed / Lapsed |