US3213951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drill with socket having a curved surface
Assignee: Individual
•
Filing: 1963-05-16
•
Granted: 1965-10-26
•
Expires: 1983-05-16
Abstract
No abstract record available.
Inventors
- 👤 Edwin G Eeles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:11
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17957; Y10T279/17965; Y10T403/00; Y10T403/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A DRILLING DEVICE COMPRISING A DRILL BIT HAVING A CUTTING HED AND A ROD RECEIVING SKIRT DEFINING A SOCKET, SAID SKIRT HAVING AN INTERIOR CYLINDRICAL SURFACE CONSTITUTING THE ENTIRE LONGITUDINAL EXTENT OF SAID SOCKET AND AN EDGE DEFINING THE MOUTH OF SAID SOCKET, SAID SURFACE BEING FUNDAMENTALLY CIRCULAR IN CROSS-SECTION THROUGHOUT ITS EXTENT AND HAVING A LONGITUDINAL AXIS OF SYMMETRY, SAID SURFACE BEING CURVED IN THE LONGITUDINAL SECTION THEREOF AND HAVING A MIXIMUM DIAMETER AT SAID MOUTH AND A DIAMETER OF SUCCESSIVELY DECREASING DEGREE FROM SAID MOUTH THROUGHOUT THE ENTIRE LONGITUDINAL EXTENT OF SAISD SURFACE.
Claim 2
Dependent Claim
95 words
A DRILLING DEVICE COMPRISING A DRILL BIT HAVING A CUTTING HED AND A ROD RECEIVING SKIRT DEFINING A SOCKET, SAID SKIRT HAVING AN INTERIOR CYLINDRICAL SURFACE CONSTITUTING THE ENTIRE LONGITUDINAL EXTENT OF SAID SOCKET AND AN EDGE DEFINING THE MOUTH OF SAID SOCKET, SAID SURFACE BEING FUNDAMENTALLY CIRCULAR IN CROSS-SECTION THROUGHOUT ITS EXTENT AND HAVING A LONGITUDINAL AXIS OF SYMMETRY, SAID SURFACE BEING CURVED IN THE LONGITUDINAL SECTION THEREOF AND HAVING A MIXIMUM DIAMETER AT SAID MOUTH AND A DIAMETER OF SUCCESSIVELY DECREASING DEGREE FROM SAID MOUTH THROUGHOUT THE ENTIRE LONGITUDINAL EXTENT OF SAISD SURFACE.
References Cited (Backward Citations)
US1203025A
Cited
US2131056A
Cited
US2354656A
Cited
US2421826A
Cited
US2967738A
Cited
US3027953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |