US2618797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversing means for electrical rotary toothbrushes
Assignee: Individual
•
Filing: 1947-08-05
•
Granted: 1952-11-25
•
Expires: 1967-08-05
Abstract
No abstract record available.
Inventors
- 👤 Donald P Grover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:14
CPC Classifications
A; A46; A46B; A46B13/00; A46B13/02; A46B13/026; A61; A61C; A61C17/00; A61C17/16; A61C17/22; A61C17/24; A61C17/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US459222A
Cited
US508129A
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US1504467A
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US1860894A
Cited
US2275247A
Cited
US2279982A
Cited
US2310626A
Cited
US2342597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-25 | 1956-05-26 | 1956-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-25 | 1960-05-26 | 1960-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-25 | 1964-05-26 | 1964-11-25 | $7700.00 | Window Closed / Lapsed |