US3718370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interchangeable jack hammer tips
Assignee: Individual
•
Filing: 1971-03-23
•
Granted: 1973-02-27
•
Expires: 1991-03-23
Abstract
Abstract THE LIFE OF JACK HAMMER INTERCHANGEABLE TIPS HAVING SMOOTH WALL SHANK RECEIVING SOCKETS IN THEIR UPPER ENDS IS GREATLY INCREASED BY INTERRUPTING THE STRAIGHT LINE OF THE INNER SURFACE OF THE WALL DEFINING THE SOCKET AT A POINT ADJACENT THE LOWER END OF THE SHANK AFTER IT HAS BEEN FULLY INSERTED IN THE SOCKET OF A REMOVABLE TIP.
Inventors
- 👤 R Caserta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:03
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/02
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |