US3557402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coiled fastening pin
Assignee: Spirol International Corp
•
Filing: 1968-12-04
•
Granted: 1971-01-26
•
Expires: 1988-12-04
Abstract
Abstract A FASTENING PIN, COMPRISING A SPIRALLY WOUND SHEET MATERIAL HAVING AN OUTER END PORTION ON THE OUTER SURFACE THEREOF TERMINATING IN AN EDGE EXTENDING ALONG ITS LENGTH, THE END PORTION INCLUDING THE EDGE AT LEAST IN PART SPACED FROM THE SHEET MATERIAL WOULD THEREUNDER CONSTITUTING A SPRING LIP, AND THE SPIRALLY WOUND SHEET MATERIAL HAVING A DIAMETRIC THICKNESS THROUGH THE END PORTION GREATER THAN THE DIAMETRIC THICKNESS THROUGH THE REST OF THE SPIRALLY WOULD SHEET MATERIAL.
Inventors
- 👤 Hans H Koehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:48
CPC Classifications
F; F16; F16B; F16B19/00; F16B19/002; F16B19/004
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |