US2708104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core drill
Assignee: Anaconda Copper Mining Co
•
Filing: 1950-11-22
•
Granted: 1955-05-10
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Expires: 1970-11-22
Abstract
No abstract record available.
Inventors
- 👤 Mcallister Donald Cameron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:47
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/48; E21B10/60; E21B10/605; E21B25/00; E21B25/10; E21B25/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-09 | 1958-11-08 | 1959-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-09 | 1962-11-08 | 1963-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-09 | 1966-11-08 | 1967-05-10 | $7700.00 | Window Closed / Lapsed |