US2997119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill bit assembly
Assignee: Pan American Petroleum Corp
•
Filing: 1958-01-06
•
Granted: 1961-08-22
•
Expires: 1978-01-06
Abstract
No abstract record available.
Inventors
- 👤 Lloyd O Goodwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:12
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/64; E21B10/66
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1159172A
Cited
US1184037A
Cited
US1326509A
Cited
US1766253A
Cited
US1571931A
Cited
US1770488A
Cited
US1777961A
Cited
US1817986A
Cited
US1978119A
Cited
US2220554A
Cited
US2294521A
Cited
US2360088A
Cited
US2764388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |