US3497019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic drilling system
Assignee: ExxonMobil Upstream Research Co
•
Filing: 1968-02-05
•
Granted: 1970-02-24
•
Expires: 1988-02-05
Abstract
No abstract record available.
Inventors
- 👤 John E Ortloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:27
CPC Classifications
E; E21; E21B; E21B44/00; E21B44/005; E21B44/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2937007A
Cited
US3088532A
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US3225843A
Cited
US3138214A
Cited
US3233689A
Cited
US3207238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |