US2058287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bore hole device and method of its use
Assignee: Individual
•
Filing: 1936-07-03
•
Granted: 1936-10-20
•
Expires: 1956-07-03
Abstract
No abstract record available.
Inventors
- 👤 Anderson Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:32
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/12
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) | 1939-10-20 | 1940-04-20 | 1940-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-10-20 | 1944-04-20 | 1944-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-10-20 | 1948-04-20 | 1948-10-20 | $7700.00 | Window Closed / Lapsed |