US3134291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-removable screw
Assignee: South Chester Corp
•
Filing: 1961-10-09
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Granted: 1964-05-26
•
Expires: 1981-10-09
Abstract
No abstract record available.
Inventors
- 👤 John K Barry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:24
CPC Classifications
F; F16; F16B; F16B23/00; F16B23/0069; Y; Y10; Y10S; Y10S411/00; Y10S411/91; Y10S411/919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN A NON-REMOVABLE SCREW, A UNITARY ASSEMBLY COMPRISING A THREADED SHANK, A HEAD FORMED INTEGRAL WITH SAID SHANK AND OF A DIAMETER SUBSTANTIALLY GREATER THAN THE DIAMETER OF SAID SHANK, AND A PLURALITY OF PINS EACH PUNCHSHEARED FROM THE PART OF SAID HEAD OVERHANGING SAID SHANK, AND EACH LODGED FIRMLY IN A THROUGH OPENING FORMED IN SAID HEAD BY SAID PUNCH-SHEARING, WITH APPROXIMATELY ONE-THIRD THE LENGTH OF THE PIN PROJECTING UPWARDLY OUT OF SAID OPENING, SAID PIN BEING ADAPTED FOR BEING DRIVEN BACK INTO SAID OPENING AND DISPOSED WITH THE OPPOSITE ENDS THEREOF RESPECTIVELY FLUSH WITH THE TOP AND BOTTOM SURFACES OF SAID HEAD, SAID ASSEMBLY IN ALL ITS PARTS BEING MADE OF HARDENED METAL SUBSTANTIALLY IMMUNE TO BEING SAWED, CHISELED OR DRILLED.
Claim 2
Dependent Claim
123 words
IN A NON-REMOVABLE SCREW, A UNITARY ASSEMBLY COMPRISING A THREADED SHANK, A HEAD FORMED INTEGRAL WITH SAID SHANK AND OF A DIAMETER SUBSTANTIALLY GREATER THAN THE DIAMETER OF SAID SHANK, AND A PLURALITY OF PINS EACH PUNCHSHEARED FROM THE PART OF SAID HEAD OVERHANGING SAID SHANK, AND EACH LODGED FIRMLY IN A THROUGH OPENING FORMED IN SAID HEAD BY SAID PUNCH-SHEARING, WITH APPROXIMATELY ONE-THIRD THE LENGTH OF THE PIN PROJECTING UPWARDLY OUT OF SAID OPENING, SAID PIN BEING ADAPTED FOR BEING DRIVEN BACK INTO SAID OPENING AND DISPOSED WITH THE OPPOSITE ENDS THEREOF RESPECTIVELY FLUSH WITH THE TOP AND BOTTOM SURFACES OF SAID HEAD, SAID ASSEMBLY IN ALL ITS PARTS BEING MADE OF HARDENED METAL SUBSTANTIALLY IMMUNE TO BEING SAWED, CHISELED OR DRILLED.
References Cited (Backward Citations)
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Cited
US1261916A
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US1184173A
Cited
US2054245A
Cited
US2201067A
Cited
US2462199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |