Patent EP0443256A1 successfully refreshed from Google Patents.
US3207024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill point screw
Assignee: Illinois Tool Works Inc
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Filing: 1962-08-20
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Granted: 1965-09-21
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Expires: 1982-08-20
Abstract
No abstract record available.
Inventors
- 👤 Charles E Sommer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:31
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/44; B21K1/46; F; F16; F16B; F16B25/00; F16B25/001; F16B25/0021; F16B25/0036; F16B25/0084; F16B25/10; F16B25/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A DRILL SCREW HAVING A HEAD PORTION AND A THREADED SHANK PORTION, SAID SHANK PORTION HAVING AN ENTERING END REMOTE FROM SAID HEAD PORTION, SAID ENTERING END BEING CHARACTERIZED AS HAVING A GENERALLY PYRAMIDAL SHAPE, A FIRST HALF OF THE PYRAMID BEING AXIALLY ADVANCED IN A DIRECTION AWAY FROM SAID HEAD PORTION RELATIVE TO THE SECOND HALF OF THE PYRAMID TO PROVIDE AN APEX ON THE FIRST ADVANCED HALF WHICH IS AXIALLY SPACED FROM THE APEX OF THE SECOND HALF, SAID APEX ON THE FIRST HALF FORMING THE TIP OF THE SCREW, A GROOVE SEPARATING SAID TWO HALVES, THE LATERAL OPPOSITE EDGES OF SAID FIRST ADVANCED HALF BEING SPACED BY SAID GROOVE FROM THE LATERAL OPPOSITE EGDE OF SAID SECOND HALF AND SAID FIRST LATERAL OPPOSITE EDGES BEING LOCATED RADIALLY OUTWARDLY OF THE SCREW AXIS A GREATER DISTANCE THAN SAID SECOND LATERAL OPPOSITE EDGES TO PROVIDE FLAT SURFA CES ADJACENT SAID FIRST LATERAL OPPOSITE EDGES WHEREBY THE LATERAL OPPOSITE EDGES OF SAID ADVANCED FIRST HALF PRESENT LATERAL CUTTING EDGES ON OPPOSITE SIDES OF SAID ENTERING END.
Claim 2
Dependent Claim
176 words
A DRILL SCREW HAVING A HEAD PORTION AND A THREADED SHANK PORTION, SAID SHANK PORTION HAVING AN ENTERING END REMOTE FROM SAID HEAD PORTION, SAID ENTERING END BEING CHARACTERIZED AS HAVING A GENERALLY PYRAMIDAL SHAPE, A FIRST HALF OF THE PYRAMID BEING AXIALLY ADVANCED IN A DIRECTION AWAY FROM SAID HEAD PORTION RELATIVE TO THE SECOND HALF OF THE PYRAMID TO PROVIDE AN APEX ON THE FIRST ADVANCED HALF WHICH IS AXIALLY SPACED FROM THE APEX OF THE SECOND HALF, SAID APEX ON THE FIRST HALF FORMING THE TIP OF THE SCREW, A GROOVE SEPARATING SAID TWO HALVES, THE LATERAL OPPOSITE EDGES OF SAID FIRST ADVANCED HALF BEING SPACED BY SAID GROOVE FROM THE LATERAL OPPOSITE EGDE OF SAID SECOND HALF AND SAID FIRST LATERAL OPPOSITE EDGES BEING LOCATED RADIALLY OUTWARDLY OF THE SCREW AXIS A GREATER DISTANCE THAN SAID SECOND LATERAL OPPOSITE EDGES TO PROVIDE FLAT SURFA CES ADJACENT SAID FIRST LATERAL OPPOSITE EDGES WHEREBY THE LATERAL OPPOSITE EDGES OF SAID ADVANCED FIRST HALF PRESENT LATERAL CUTTING EDGES ON OPPOSITE SIDES OF SAID ENTERING END.
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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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |