US3208540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansible rotary well drilling bit
Assignee: Baker Hughes Oilfield Operations LLC
•
Filing: 1963-03-21
•
Granted: 1965-09-28
•
Expires: 1983-03-21
Abstract
No abstract record available.
Inventors
- 👤 Robert O Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:49
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26; E21B10/32; E21B10/322
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN A ROTARY DRILL BIT: A BODY HAVING A SLOT; A SUPPORT MEMBER IN SAID SLOT, SAID SUPPORT MEMBER HAVING A SLOT OPENING DOWNWARDLY INTO SAID BODY SLOT; MEANS SECURING SAID SUPPORT MEMBER TO SAID BODY AGAINST MOVEMENT WITH RESPECT THERETO; CUTTER MEANS IN SAID SUPPORT MEMBER SLOT; MEANS MOUNTING SAID CUTTER MEANS FOR LATERAL MOVEMENT IN SAID SUPPORT MEMBER BETWEEN RETRACTED SAID EXPANDED POSITIONS, SAID MOUNTING MEANS EXTENDING ALONG ITS AXIS NO FURTHER THAN THE SIDES OF SAID BODY SLOT; AND MEANS FOR EXPANDING SAID CUTTER MEANS LATERALLY OUTWARDLY OF SAID SUPPORT MEMBER AND BODY AND INTO ENGAGEMENT WITH SAID SUPPORT MEMBER AT THE UPPER END OF SAID SUPPORT MEMBER SLOT.
Claim 2
Dependent Claim
112 words
IN A ROTARY DRILL BIT: A BODY HAVING A SLOT; A SUPPORT MEMBER IN SAID SLOT, SAID SUPPORT MEMBER HAVING A SLOT OPENING DOWNWARDLY INTO SAID BODY SLOT; MEANS SECURING SAID SUPPORT MEMBER TO SAID BODY AGAINST MOVEMENT WITH RESPECT THERETO; CUTTER MEANS IN SAID SUPPORT MEMBER SLOT; MEANS MOUNTING SAID CUTTER MEANS FOR LATERAL MOVEMENT IN SAID SUPPORT MEMBER BETWEEN RETRACTED SAID EXPANDED POSITIONS, SAID MOUNTING MEANS EXTENDING ALONG ITS AXIS NO FURTHER THAN THE SIDES OF SAID BODY SLOT; AND MEANS FOR EXPANDING SAID CUTTER MEANS LATERALLY OUTWARDLY OF SAID SUPPORT MEMBER AND BODY AND INTO ENGAGEMENT WITH SAID SUPPORT MEMBER AT THE UPPER END OF SAID SUPPORT MEMBER SLOT.
References Cited (Backward Citations)
US1337913A
Cited
US1819367A
Cited
GB502203A
Cited
US2223984A
Cited
US2699921A
Cited
US2698738A
Cited
US2872160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |