US3269250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Universal screw head
Assignee: ABB Installation Products Inc
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Filing: 1964-07-02
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Granted: 1966-08-30
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Expires: 1984-07-02
Abstract
No abstract record available.
Inventors
- 👤 Lawrence M Curtiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:20
CPC Classifications
F; F16; F16B; F16B23/00; F16B23/0007; F16B23/0023; Y; Y10; Y10S; Y10S411/00; Y10S411/919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A SCREW HEAD OF SUBSTANTIAL LENGTH AND UNIFORM DIAMETER HAVING A CROSS-SLOTTED DRIVING RECESS CENTRALLY THEREOF FORMING A PLURALITY OF DIAMETRICALLY OPPOSITE TRIANGULAR SEGMENTS, EACH OF SAID SEGMENTS PRESENTING A SLIGHTLY INCLINED UPSTANTING CORNER EDGE RADIALLY OF AND ADJACENT THE SCREW HEAD AXIS ADAPTED TO BE ENGAGED BY A WINGED TYPE DRIVING TOOL, EACH OF SAID SEGMENTS HAVING A TOP FACE AND A RIDGE EXTENDING RADIALLY OF SAID SCREW HEAD AND BISECTING SAID SEGMENT, SAID TOP FACE BEING INCLINED DOWNWARDLY RADIALLY TOWARD THE SCREW HEAD AXIS AND INCLINED DOWNWARDLY IN OPPOSITE DIRECTIONS FROM SAID RIDGES SO AS TO DEFINE A PAIR OF SLOPING TRIANGULAR SURFACES
Claim 2
Dependent Claim
105 words
A SCREW HEAD OF SUBSTANTIAL LENGTH AND UNIFORM DIAMETER HAVING A CROSS-SLOTTED DRIVING RECESS CENTRALLY THEREOF FORMING A PLURALITY OF DIAMETRICALLY OPPOSITE TRIANGULAR SEGMENTS, EACH OF SAID SEGMENTS PRESENTING A SLIGHTLY INCLINED UPSTANTING CORNER EDGE RADIALLY OF AND ADJACENT THE SCREW HEAD AXIS ADAPTED TO BE ENGAGED BY A WINGED TYPE DRIVING TOOL, EACH OF SAID SEGMENTS HAVING A TOP FACE AND A RIDGE EXTENDING RADIALLY OF SAID SCREW HEAD AND BISECTING SAID SEGMENT, SAID TOP FACE BEING INCLINED DOWNWARDLY RADIALLY TOWARD THE SCREW HEAD AXIS AND INCLINED DOWNWARDLY IN OPPOSITE DIRECTIONS FROM SAID RIDGES SO AS TO DEFINE A PAIR OF SLOPING TRIANGULAR SURFACES
References Cited (Backward Citations)
US2206085A
Cited
US2556155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |