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Patent US3223920A successfully refreshed from Google Patents.
US3223920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise suppressing transformer
Assignee: Individual
•
Filing: 1961-12-21
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Granted: 1965-12-14
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Expires: 1981-12-21
Abstract
No abstract record available.
Inventors
- 👤 Sasaki Shiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:29
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/34; H01F27/36; H01F27/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A TRANSFORMER COMPRISING A PRIMARY WINDING ONE TERMINAL OF WHICH IS CONNECTED TO ONE INPUT TERMINAL AND THE OTHER TERMINAL OF WHICH IS CONNECTED TO ONE TERMINAL OF A LOAD, A SECONDARY WINDING ELECTRO-MAGNETICALLY COUPLED WITH SAID PRIMARY WINDING AND ONE TERMINAL OF WHICH IS CONNECTED TO THE OTHER INPUT TERMINAL AND THE OTHER TERMINAL OF WHICH IS CONNECTED TO THE OTHER TERMINAL OF SAID LOAD, A TERTIARY WINDING WHICH IS ELECTRO-MAG-
Claim 2
Dependent Claim
72 words
A TRANSFORMER COMPRISING A PRIMARY WINDING ONE TERMINAL OF WHICH IS CONNECTED TO ONE INPUT TERMINAL AND THE OTHER TERMINAL OF WHICH IS CONNECTED TO ONE TERMINAL OF A LOAD, A SECONDARY WINDING ELECTRO-MAGNETICALLY COUPLED WITH SAID PRIMARY WINDING AND ONE TERMINAL OF WHICH IS CONNECTED TO THE OTHER INPUT TERMINAL AND THE OTHER TERMINAL OF WHICH IS CONNECTED TO THE OTHER TERMINAL OF SAID LOAD, A TERTIARY WINDING WHICH IS ELECTRO-MAG-
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |