US2609182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for drilling deep wells
Assignee: Individual
•
Filing: 1946-11-23
•
Granted: 1952-09-02
•
Expires: 1966-11-23
Abstract
No abstract record available.
Inventors
- 👤 Arutunoff Armais
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:42
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/04; E21B27/00; E21B27/005; E21B4/18
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |