Patent US3363500A successfully refreshed from Google Patents.
US3363500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw
Assignee: National Screw and Manufacturing Co
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Filing: 1965-03-10
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Granted: 1968-01-16
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Expires: 1985-03-10
Abstract
No abstract record available.
Inventors
- 👤 John J Simko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:47
CPC Classifications
F; F16; F16B; F16B23/00; F16B23/0007; Y; Y10; Y10S; Y10S411/00; Y10S411/91; Y10S411/919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A THREADED FASTENER HAVING A DRIVING RECESS IN THE DRIVING END THEREOF THE MAJOR SURFACE OF WHICH RECESS IS A RIGHT CIRCULAR CONICAL SURFACE WITH THE APEX OF SAID SURFACE LYING SUBSTANTIALLY ON THE AXIS OF THE FASTENER, SAID RECESS ALSO HAVING THREE SYMMETRICALLY ARRANGED SIMILAR PLANAR FACES PARALLEL WITH THE AXIS OF SAID FASTENER AND TERMINATING IN THE SURFACE OF THE DRIVING END OF THE FASTENER WITH THE INTERSECTIONS OF SAID FACES AND THE SURFACE OF THE DRIVING END OF THE FASTENER BEING CHORDS OF AN IMAGINARY CIRCLE FORMED BY THE INTERSECTION OF SAID CONICAL SURFACE IF EXTENDED AND THE SURFACE OF THE DRIVING END OF THE FASTENER, SAID CONICAL SURFACE INTERSECTING THE SURFACE OF THE DRIVING END AT LEAST AT POINTS ON SAID IMAGINARY CIRCLE AT THE ENDS OF THE SAID CHORDS, SAID THREE AXIALLY ORIENTED FACES FORMING ABUTMENTS THROUGH WHICH TORQUE MAY BE APPLIED TO THE FASTENER BY A DRIVER.
Claim 2
Dependent Claim
153 words
A THREADED FASTENER HAVING A DRIVING RECESS IN THE DRIVING END THEREOF THE MAJOR SURFACE OF WHICH RECESS IS A RIGHT CIRCULAR CONICAL SURFACE WITH THE APEX OF SAID SURFACE LYING SUBSTANTIALLY ON THE AXIS OF THE FASTENER, SAID RECESS ALSO HAVING THREE SYMMETRICALLY ARRANGED SIMILAR PLANAR FACES PARALLEL WITH THE AXIS OF SAID FASTENER AND TERMINATING IN THE SURFACE OF THE DRIVING END OF THE FASTENER WITH THE INTERSECTIONS OF SAID FACES AND THE SURFACE OF THE DRIVING END OF THE FASTENER BEING CHORDS OF AN IMAGINARY CIRCLE FORMED BY THE INTERSECTION OF SAID CONICAL SURFACE IF EXTENDED AND THE SURFACE OF THE DRIVING END OF THE FASTENER, SAID CONICAL SURFACE INTERSECTING THE SURFACE OF THE DRIVING END AT LEAST AT POINTS ON SAID IMAGINARY CIRCLE AT THE ENDS OF THE SAID CHORDS, SAID THREE AXIALLY ORIENTED FACES FORMING ABUTMENTS THROUGH WHICH TORQUE MAY BE APPLIED TO THE FASTENER BY A DRIVER.
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) | 1971-01-15 | 1971-07-17 | 1972-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-15 | 1975-07-17 | 1976-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-15 | 1979-07-17 | 1980-01-16 | $7700.00 | Window Closed / Lapsed |