Patent US3265139A successfully refreshed from Google Patents.
US3265139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller cone drill bit
Assignee: ConocoPhillips Co
•
Filing: 1963-12-09
•
Granted: 1966-08-09
•
Expires: 1983-12-09
Abstract
No abstract record available.
Inventors
- 👤 Elard L Haden
- 👤 Jr Henry A Bourne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:45
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A ROTARY DRILLING BIT FOR BORING A HOLE INTO THE SURFACE OF RELATIVELY HARD MATERIAL COMPRISING: A BODY HAVING A VERTICALLY EXTENDING, LONGITUDINAL AXIS OF ROTATION;
Claim 2
Dependent Claim
26 words
A ROTARY DRILLING BIT FOR BORING A HOLE INTO THE SURFACE OF RELATIVELY HARD MATERIAL COMPRISING: A BODY HAVING A VERTICALLY EXTENDING, LONGITUDINAL AXIS OF ROTATION;
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |