Patent US1860871A successfully refreshed from Google Patents.
US3025480A
Expired / Lapsed
US
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High frequency balancing units
Assignee: Individual
•
Filing: 1959-03-24
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Granted: 1962-03-13
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Expires: 1979-03-24
Abstract
No abstract record available.
Inventors
- 👤 Guanella Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:24
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/04; H01P; H01P5/00; H01P5/08; H01P5/10; H03; H03H; H03H7/00; H03H7/38; H03H7/383; H03H7/42; H03H7/422
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |