US3094176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Percussion drill
Assignee: ExxonMobil Oil Corp
•
Filing: 1959-07-31
•
Granted: 1963-06-18
•
Expires: 1979-07-31
Abstract
No abstract record available.
Inventors
- 👤 Evin L Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:00
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/06; E21B4/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A FLUID-ACTUATED PERCUSSION DRILLING DEVICE THE COMBINATION WHICH COMPRISES AN OUTER TUBE, AN INNER TUBE CONCENTRICALLY POSITIONED WITHIN AND SPACED APART FROM SAID OUTER TUBE, SAID INNER TUBE BEING OPEN AT THE UPPER END THEREOF INTO SAID OUTER TUBE, A VALVE AT THE LOWER END OF SAID INNER TUBE, SPRING MEANS ON SAID VALVE FOR HOLDING SAID VALVE OPEN UNTIL FLUID FLOW THROUGH SAID INNER TUBE EXCEEDS A PREDETERMINED RATE, AND BODY MEANS SLIDABLY SECURED WITHIN SAID OUTER TUBE FOR SUPPORTING SAID INNER TUBE AND VALVE, SAID BODY MEANS BEING PROVIDED WITH AT LEAST ONE FLUID FLOW PASSAGE THERETHROUGH IN COMMUNICA-
Claim 2
Dependent Claim
102 words
IN A FLUID-ACTUATED PERCUSSION DRILLING DEVICE THE COMBINATION WHICH COMPRISES AN OUTER TUBE, AN INNER TUBE CONCENTRICALLY POSITIONED WITHIN AND SPACED APART FROM SAID OUTER TUBE, SAID INNER TUBE BEING OPEN AT THE UPPER END THEREOF INTO SAID OUTER TUBE, A VALVE AT THE LOWER END OF SAID INNER TUBE, SPRING MEANS ON SAID VALVE FOR HOLDING SAID VALVE OPEN UNTIL FLUID FLOW THROUGH SAID INNER TUBE EXCEEDS A PREDETERMINED RATE, AND BODY MEANS SLIDABLY SECURED WITHIN SAID OUTER TUBE FOR SUPPORTING SAID INNER TUBE AND VALVE, SAID BODY MEANS BEING PROVIDED WITH AT LEAST ONE FLUID FLOW PASSAGE THERETHROUGH IN COMMUNICA-
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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) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |