Patent US2441520A successfully refreshed from Google Patents.
US2441520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fountain toothbrush with hand-feed valve
Assignee: HOWARD L FISCHER
•
Filing: 1943-07-26
•
Granted: 1948-05-11
•
Expires: 1963-07-26
Abstract
No abstract record available.
Inventors
- 👤 Ulvick George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:36
CPC Classifications
A; A46; A46B; A46B11/00; A46B11/001; A46B11/002; A46B11/0041
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US457826A
Cited
US743582A
Cited
US737471A
Cited
US1068372A
Cited
US2306482A
Cited
US2226663A
Cited
US2269513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-11 | 1951-11-10 | 1952-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-11 | 1955-11-10 | 1956-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-11 | 1959-11-10 | 1960-05-11 | $7700.00 | Window Closed / Lapsed |