US2650990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of electrical supply for dental apparatus
Assignee: Individual
•
Filing: 1949-05-18
•
Granted: 1953-09-01
•
Expires: 1969-05-18
Abstract
No abstract record available.
Inventors
- 👤 Ben H Woodruff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:28
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/0007; A61G; A61G15/00; A61G15/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US566103A
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US1194243A
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US2009013A
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US2290688A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |