US3061025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unitized drilling bit
Assignee: Hughes Tool Co
•
Filing: 1959-03-31
•
Granted: 1962-10-30
•
Expires: 1979-03-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Jesse L Stockard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:17
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/62; E21B10/627
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US387680A
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US1428122A
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US2209079A
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US2226655A
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US2688264A
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US2666622A
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US2620686A
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US2656153A
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US2855181A
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US3011557A
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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) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |