Patent US3338069A successfully refreshed from Google Patents.
US3338069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary drill collar
Assignee: ExxonMobil Upstream Research Co
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Filing: 1965-03-11
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Granted: 1967-08-29
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Expires: 1985-03-11
Abstract
No abstract record available.
Inventors
- 👤 John E Ortloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:37
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A MULTISIDED DRILL COLLAR CONTAINING A LONGITUDINAL PASSAGEWAY FOR THE TRANSMISSION OF FLUID AND INCLUDING MEANS FOR CONNECTING SAID COLLAR IN A ROTARY DRILL STRING, SAID COLLAR HAVING ROUNDED CORNERS EXTENDING PARALLEL TO ITS LONGITUDINAL AXIS AT EQUALLY SPACED INTERVALS ABOUT ITS PERIPHERY AND GENERALLY PLANAR SIDES EXTENDING BETWEEN SAID
Claim 2
Dependent Claim
50 words
A MULTISIDED DRILL COLLAR CONTAINING A LONGITUDINAL PASSAGEWAY FOR THE TRANSMISSION OF FLUID AND INCLUDING MEANS FOR CONNECTING SAID COLLAR IN A ROTARY DRILL STRING, SAID COLLAR HAVING ROUNDED CORNERS EXTENDING PARALLEL TO ITS LONGITUDINAL AXIS AT EQUALLY SPACED INTERVALS ABOUT ITS PERIPHERY AND GENERALLY PLANAR SIDES EXTENDING BETWEEN SAID
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-28 | 1971-02-27 | 1971-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-28 | 1975-02-27 | 1975-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-28 | 1979-02-27 | 1979-08-29 | $7700.00 | Window Closed / Lapsed |