US2966949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Full hole permanent drill bit
Assignee: Jersey Production Research Co
•
Filing: 1958-07-16
•
Granted: 1961-01-03
•
Expires: 1978-07-16
Abstract
No abstract record available.
Inventors
- 👤 Jr George B Wepsala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:41
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/006; E21B10/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US994866A
Cited
US1940890A
Cited
US2296183A
Cited
US2342931A
Cited
US2493178A
Cited
US2838284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-03 | 1964-07-04 | 1965-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-03 | 1968-07-04 | 1969-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-03 | 1972-07-04 | 1973-01-03 | $7700.00 | Window Closed / Lapsed |