US2595715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for expediting the drilling of wells
Assignee: JOHN H POE
•
Filing: 1947-01-28
•
Granted: 1952-05-06
•
Expires: 1967-01-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:13
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/01; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7842; Y10T137/8593; Y10T137/87571; Y10T137/87676; Y10T137/87684
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US307606A
Cited
US1077697A
Cited
US1217467A
Cited
US1801788A
Cited
US1928947A
Cited
US2158356A
Cited
US2128352A
Cited
US2130401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |