US2950903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary drilling bit
Assignee: Individual
•
Filing: 1958-08-06
•
Granted: 1960-08-30
•
Expires: 1978-08-06
Abstract
No abstract record available.
Inventors
- 👤 Thomas A White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:15
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/62; E21B10/627
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2498251A
Cited
US2656153A
Cited
US2830794A
Cited
US2855181A
Cited
US2861779A
Cited
US2859942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-30 | 1964-02-29 | 1964-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-30 | 1968-02-29 | 1968-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-30 | 1972-02-29 | 1972-08-30 | $7700.00 | Window Closed / Lapsed |