US3079968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking self-tapping sheet metal screws
Assignee: Nylok LLC
•
Filing: 1959-08-26
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Granted: 1963-03-05
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Expires: 1979-08-26
Abstract
No abstract record available.
Inventors
- 👤 Timothy J Buckley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:11
CPC Classifications
F; F16; F16B; F16B25/00; F16B25/001; F16B25/0021; F16B25/0036; F16B25/0042; F16B25/0052; F16B25/0078; F16B25/0094; F16B39/00; F16B39/22; F16B39/28; F16B39/34; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/947
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A SELF-TAPPING, SELF-LOCKING SHEEET METAL SCREW COMPRISING A SHANK HAVING A PLURALITY OF CONVOLUTIONS OF A HELICAL SCREW THREAD THEREON FOR TAPPING THREADS IN SHEET METAL, SAID THREAD BEING OF SUBSTANTIALLY UNIFORM CROSSSECTION THROUGHOUT THE MAJOR PORTION OF ITS LENGTH AND HAVING AN AXIAL ROOT DIMENSION AT LEAST AS GREAT AS THE AXIAL BASE DIMENSION OF THE THREAD, SAID SHANK HAVING A TIP SMALLER THAN SAID SHANK AND A HEAD AT THE END OF SAID SHANK OPPOSITE SAID TIP, A PORTION OF SAID SHANK BETWEEN SAID HEAD AND TIP HAVING THREADS OF GREATER ROOT DIAMETER THAN THE REMAINDER OF SAID SHANK, A RECESS IN THE SIDE OF THE SCREW SHANK, AT LEAST A PART OF WHICH IS POSITIONED BETWEEN SAID PORTION OF GREATER ROOT DIAMETER AND SAID HEAD, AND A RESILIENT INSERT MEMBER IN SAID RECESS EXTENDING RADIALLY BEYOND THE ROOT LINE OF SAID PORTION OF SAID THREAD BETWEEN SAID HEAD AND SAID ENLARGED ROOT DIAMETER PORTION.
Claim 2
Dependent Claim
157 words
A SELF-TAPPING, SELF-LOCKING SHEEET METAL SCREW COMPRISING A SHANK HAVING A PLURALITY OF CONVOLUTIONS OF A HELICAL SCREW THREAD THEREON FOR TAPPING THREADS IN SHEET METAL, SAID THREAD BEING OF SUBSTANTIALLY UNIFORM CROSSSECTION THROUGHOUT THE MAJOR PORTION OF ITS LENGTH AND HAVING AN AXIAL ROOT DIMENSION AT LEAST AS GREAT AS THE AXIAL BASE DIMENSION OF THE THREAD, SAID SHANK HAVING A TIP SMALLER THAN SAID SHANK AND A HEAD AT THE END OF SAID SHANK OPPOSITE SAID TIP, A PORTION OF SAID SHANK BETWEEN SAID HEAD AND TIP HAVING THREADS OF GREATER ROOT DIAMETER THAN THE REMAINDER OF SAID SHANK, A RECESS IN THE SIDE OF THE SCREW SHANK, AT LEAST A PART OF WHICH IS POSITIONED BETWEEN SAID PORTION OF GREATER ROOT DIAMETER AND SAID HEAD, AND A RESILIENT INSERT MEMBER IN SAID RECESS EXTENDING RADIALLY BEYOND THE ROOT LINE OF SAID PORTION OF SAID THREAD BETWEEN SAID HEAD AND SAID ENLARGED ROOT DIAMETER PORTION.
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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) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |