US2857511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced mixer
Assignee: Individual
•
Filing: 1956-03-02
•
Granted: 1958-10-21
•
Expires: 1976-03-02
Abstract
No abstract record available.
Inventors
- 👤 Ben H Tongue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:26
CPC Classifications
H; H03; H03D; H03D7/00; H03D7/14; H03D7/1416
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1258548A
Cited
US2171151A
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US2122283A
Cited
US2606284A
Cited
US2443754A
Cited
US2499569A
Cited
US2521116A
Cited
US2565409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |