US2726064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling and conveying apparatus
Assignee: Joy Manufacturing Co
•
Filing: 1949-05-24
•
Granted: 1955-12-06
•
Expires: 1969-05-24
Abstract
No abstract record available.
Inventors
- 👤 Ross H Goodrich
- 👤 Ralph F Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:57
CPC Classifications
E; E21; E21C; E21C25/00; E21C25/58
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) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |