USRE28111E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener with improved thread construction
Assignee: —
•
Filing: 1973-12-04
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Granted: 1974-08-13
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Expires: 1993-12-04
Abstract
Abstract A FASTENER HAVING A SHANK DIVIDED INTO FIRST AND SECOND PORTIONS RESPECTIVELY LOCATED ADJACENT A HEAD END AND A TAPERED POINTED END WITH THE FIRST PORTION HAVING A SINGLE THREAD FORMED THEREON OF UNIFORM PITCH. A MULTIPLE OF PARALLEL THREADS OF SIMILAR UNIFORM PITCH ARE FORMED ON THE SECOND PORTION OF THE SHANK AND ONE OF THE THREADS ON THE SECOND PORTION IS A CONTINUATION OF THE THREAD ON THE FIRST PORTION. ALL OF THE THREADS HAVE A SUBSTANTIALLY UNIFORM MINOR DIAMETER WHILE THE MAJOR DIAMETER OF THE UPPER SINGLE THREAD PORTION IS GREATER THAN THE MAJOR DIAMETER OF THE LOWER MULTIPLE THREAD PORTION.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:09
CPC Classifications
F; F16; F16B; F16B25/00; F16B25/0036; F16B25/0042; F16B25/0057; F16B25/001; F16B25/0031; F16B25/0068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |