US3175593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screwdriver blade
Assignee: Individual
•
Filing: 1962-03-27
•
Granted: 1965-03-30
•
Expires: 1982-03-27
Abstract
No abstract record available.
Inventors
- 👤 Launay Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:28
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/44; B21K1/46; B21K1/463; B25; B25B; B25B15/00; B25B15/001; B25B15/004; B25B15/007; F; F16; F16B; F16B23/00; F16B23/0007; F16B23/0015; Y; Y10; Y10S; Y10S411/00; Y10S411/919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A SCREWDRIVER COMPRISING A BLADE HAVING AN AXIAL OF SYMMETRY IN ITS LONGITUDINAL DIRECTION, SAID BLADE BEING OF SUBSTANTIALLY DIAMOND-SHAPED CROSS SECTION IN PLANES PERPENDICULAR TO SAID AXIS, SAID BLADE HAVING OPPOSED SIDE WALLS TAPERING AT AN ACUTE ANGLE TOWARD AN END THEREOF, SAID BLADE END INCLUDING A CENTRAL LOCATED FRUSTO-CONICAL AXIAL PROJECTION THE APEX ANGLE OF TAPER BETWEEN TWO PROXIMATELY EQUAL TO THE ACUTE ANGLE OF TAPER BETWEEN THE OPPOSED SIDE WALLS, EACH OF SAID SIDE WALLS COMPRISING TWO FLAT SURFACES LOCATED IN RESPECTIVE PLANES INTERSECTING EACH OTHER ALONG A STRAIGHT LINE HAVING THE SAME INCLINATION WITH RESPECT TO SAID AXIS AS THE GENERATRICES OF THE SURFACE OF SAID FRUCTO-CONICAL AXIAL PROJECTION, SAID TWO PLANES INTERSECTING SAID FRUSTO-CONICAL SURFACE.
Claim 2
Dependent Claim
120 words
A SCREWDRIVER COMPRISING A BLADE HAVING AN AXIAL OF SYMMETRY IN ITS LONGITUDINAL DIRECTION, SAID BLADE BEING OF SUBSTANTIALLY DIAMOND-SHAPED CROSS SECTION IN PLANES PERPENDICULAR TO SAID AXIS, SAID BLADE HAVING OPPOSED SIDE WALLS TAPERING AT AN ACUTE ANGLE TOWARD AN END THEREOF, SAID BLADE END INCLUDING A CENTRAL LOCATED FRUSTO-CONICAL AXIAL PROJECTION THE APEX ANGLE OF TAPER BETWEEN TWO PROXIMATELY EQUAL TO THE ACUTE ANGLE OF TAPER BETWEEN THE OPPOSED SIDE WALLS, EACH OF SAID SIDE WALLS COMPRISING TWO FLAT SURFACES LOCATED IN RESPECTIVE PLANES INTERSECTING EACH OTHER ALONG A STRAIGHT LINE HAVING THE SAME INCLINATION WITH RESPECT TO SAID AXIS AS THE GENERATRICES OF THE SURFACE OF SAID FRUCTO-CONICAL AXIAL PROJECTION, SAID TWO PLANES INTERSECTING SAID FRUSTO-CONICAL SURFACE.
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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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |