Patent US1522593A successfully refreshed from Google Patents.
US1522593A
Expired / Lapsed
US
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Rotary drilling tool
Assignee: Individual
•
Filing: 1919-10-13
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Granted: 1925-01-13
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Expires: 1939-10-13
Abstract
No abstract record available.
Inventors
- 👤 Rowland O Pickin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:37
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B10/567; E21B10/5676
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) | 1928-01-13 | 1928-07-14 | 1929-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-01-13 | 1932-07-14 | 1933-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-01-13 | 1936-07-14 | 1937-01-13 | $7700.00 | Window Closed / Lapsed |