Patent US3551932A successfully refreshed from Google Patents.
US3551932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric toothbrush
Assignee: Individual
•
Filing: 1969-02-20
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Granted: 1971-01-05
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Expires: 1989-02-20
Abstract
Abstract A MOTOR-DRIVEN TOOTHBRUSH IS PROVIDED WHEREIN THE BRUSH IS ROTATED CONTINUOUSLY IN EITHER DIRECTION BY MEANS OF A REVERSIBLE MOTOR MOUNTED IN THE HANDLE. THE BRUSH AND STEM ARE DETACHABLY CONNECTED TO THE MOTOR DRIVE ROD AND BOTH THE STEM AND THE BRUSH ARE ENCLOSED WITHIN A SLEEVE ATTACHED TO A MOTOR HOUSING. THE END OF THE SLEEVE ENCLOSING THE BRUSH IS FORMED WITH A HOODED OPENING TO EXPOSE ONLY AN ANGULAR SECTION OF THE BRUSH. THE SLEEVE IS IN TWO LONGITUDINAL PARTS HINGED TOGETHER TO PERMIT READY REPLACEMENT OF THE BRUSH AND EASE OF CLEANING.
Inventors
- 👤 Sidney Grossman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:44
CPC Classifications
A; A61; A61C; A61C17/00; A61C17/16; A61C17/22; A61C17/24; A61C17/26; A46; A46B; A46B13/00; A46B13/02
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |