US3058532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill bit condition indicator and signaling system
Assignee: Dresser Industries Inc
•
Filing: 1953-07-15
•
Granted: 1962-10-16
•
Expires: 1973-07-15
Abstract
No abstract record available.
Inventors
- 👤 Alder Robert Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:05
CPC Classifications
E; E21; E21B; E21B12/00; E21B12/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22531E
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US2352833A
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US2388141A
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US2434835A
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US2590215A
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US2575173A
Cited
US2562833A
Cited
US2669871A
Cited
US2658724A
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US2627392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-15 | 1966-04-16 | 1966-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-15 | 1970-04-16 | 1970-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-15 | 1974-04-16 | 1974-10-16 | $7700.00 | Window Closed / Lapsed |