Patent US3196259A successfully refreshed from Google Patents.
Patent US3566471A successfully refreshed from Google Patents.
US3566471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multispeed dental handpiece and drive therefor
Assignee: Individual
•
Filing: 1968-04-01
•
Granted: 1971-03-02
•
Expires: 1988-04-01
Abstract
Abstract A MULTISPEED DRIVE FOR DENTAL HANDPIECES AND THE LIKE COMPRISING A FIRST HOUSING, A SHAFT IN THE HOUSING, A FIRST STAGE DRIVE ASSEMBLY IN THE HOUSING HAVING A FIRST TRANSMITTING TORQUE VALVE, A SECOND STAGE DRIVE ASSEMBLY IN THE HOUSING CONNECTED TO THE FIRST STAGE DRIVE ASSEMBLY AND TO THE DRIVE SHAFT AND HAVING A SECOND TRANSMITTING TORQUE VALUE DIFFERING FROM THE FIRST TRANSMITTING TORQUE VALUE, MEANS FOR DRIVING THE FIRST STAGE DRIVE ASSEMBLY, AND MEANS FOR SHORTING OUT THE SECOND STAGE DRIVE ASSEMBLY HAVING OPERATIVE AND NON-OIPERATIVE POSITIONS, THEREBY TO SELECTIVELY DRIVE THE DRIVE SHAFT AT DIFFERENT SPEEDS.
Inventors
- 👤 Walter E Bull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:16
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/08; A61C1/18; A61C1/185
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |