US2490895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency vibrator
Assignee: Duracell Inc USA
•
Filing: 1945-02-22
•
Granted: 1949-12-13
•
Expires: 1965-02-22
Abstract
No abstract record available.
Inventors
- 👤 Robert J Aust
- 👤 Huetten Clarence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:57
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/64; H01H50/74; H01H50/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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AT109339B
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US1834129A
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GB344948A
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US2013513A
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US2066995A
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US2065597A
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US2190685A
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US2207292A
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US2364684A
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US2423524A
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GB550975A
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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) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |