Patent US3764471A successfully refreshed from Google Patents.
Patent US3327253A successfully refreshed from Google Patents.
US3327253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impedance matching ferrite transformer wherein center conductor of associated coaxial cable forms primary winding
Assignee: Individual
•
Filing: 1962-09-14
•
Granted: 1967-06-20
•
Expires: 1982-09-14
Abstract
No abstract record available.
Inventors
- 👤 John G Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:23
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/04; H01F17/06; H01F2017/065; H01F27/00; H01F27/28; H01F27/2823; H01F2027/2833
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
AN IMPEDANCE MATCHING DEVICE COMPRISING: A LENGTH OF COAXIAL CABLE HAVING A CENTER CONDUCTOR AND AN OUTER CONDUCTOR; A MAGNETIC CORE OF FERRITE MATERIAL HAVING A PERIPHERAL GROOVE THEREIN; A PRIMARY WINDING SURROUNDING SAID CORE AND DISPOSED IN SAID GROOVE, SAID PRIMARY WINDING BEING A LOOP OF THE CENTER CONDUCTOR OF SAID COAXIAL CABLE WITH THE FREE END OF SAID CENTER CONDUCTOR ELECTRICALLY CONNECTED TO THE OUTER CONDUCTOR OF SAID CABLE; A SECONDARY WINDING ON SAID CORE AND DISPOSED IN SAID GROOVE WITH A PAIR OF TERMINAL ENDS PRO-
Claim 2
Dependent Claim
89 words
AN IMPEDANCE MATCHING DEVICE COMPRISING: A LENGTH OF COAXIAL CABLE HAVING A CENTER CONDUCTOR AND AN OUTER CONDUCTOR; A MAGNETIC CORE OF FERRITE MATERIAL HAVING A PERIPHERAL GROOVE THEREIN; A PRIMARY WINDING SURROUNDING SAID CORE AND DISPOSED IN SAID GROOVE, SAID PRIMARY WINDING BEING A LOOP OF THE CENTER CONDUCTOR OF SAID COAXIAL CABLE WITH THE FREE END OF SAID CENTER CONDUCTOR ELECTRICALLY CONNECTED TO THE OUTER CONDUCTOR OF SAID CABLE; A SECONDARY WINDING ON SAID CORE AND DISPOSED IN SAID GROOVE WITH A PAIR OF TERMINAL ENDS PRO-
References Cited (Backward Citations)
US2189309A
Cited
US2613268A
Cited
US2628312A
Cited
US2679007A
Cited
US2611080A
Cited
US2721260A
Cited
US2666183A
Cited
US2838737A
Cited
US2855571A
Cited
US3056925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |