US2743084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling apparatus with sedimentation reservoir
Assignee: Individual
•
Filing: 1952-09-10
•
Granted: 1956-04-24
•
Expires: 1972-09-10
Abstract
No abstract record available.
Inventors
- 👤 Arutunoff Armais
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:13
CPC Classifications
E; E21; E21B; E21B25/00; E21B21/00; E21B21/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1283542A
Cited
US1350059A
Cited
US1477563A
Cited
US1870696A
Cited
US2056471A
Cited
US2609182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |