Patent US3202889A successfully refreshed from Google Patents.
US3202889A
Expired / Lapsed
US
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Variable capacitor
Assignee: Toko Radio Coil Kenkyusho KK
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Filing: 1962-03-13
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Granted: 1965-08-24
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Expires: 1982-03-13
Abstract
No abstract record available.
Inventors
- 👤 Matsui Daijiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:45
CPC Classifications
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Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A VARIABLE CAPACITOR OF THE TYPE CONSISTING OF A STATOR AND A ROTOR, ONE OF WHICH IS ESSENTIALY A FLAT PIECE OF DIELECTRIC MATERIAL WITH ONE SURFACE HAVING AN ELECTRODE PRINTED THEREON AND THE OTHER SURFACE SERVING AS A SLIDING SURFACE, AND THE OTHER OF WHICH IS AN OPPOSITE ELECTRODE DISPOSED ROTATABLY, WITH COMPRESSIVE CONTACT PRESSURE, AGAINST THE SAID SLIDING SURFACE, AT LEAST ONE SEMIANNULAR GROOVE, NARROW WITH RESPECT TO SAID ONE SURFACE, IN THE SLIDING SURFACE OF AT LEAST ONE OF SAID STATOR AND ROTOR, AN ELECTRICALLY NON-CONDUCTIVE LIQUID LUBRICANT PLACED IN SAID GROOVE, AND MEANS FOR RETAINING SAID LUBRICANT IN SAID GROOVE.
Claim 2
Dependent Claim
105 words
IN A VARIABLE CAPACITOR OF THE TYPE CONSISTING OF A STATOR AND A ROTOR, ONE OF WHICH IS ESSENTIALY A FLAT PIECE OF DIELECTRIC MATERIAL WITH ONE SURFACE HAVING AN ELECTRODE PRINTED THEREON AND THE OTHER SURFACE SERVING AS A SLIDING SURFACE, AND THE OTHER OF WHICH IS AN OPPOSITE ELECTRODE DISPOSED ROTATABLY, WITH COMPRESSIVE CONTACT PRESSURE, AGAINST THE SAID SLIDING SURFACE, AT LEAST ONE SEMIANNULAR GROOVE, NARROW WITH RESPECT TO SAID ONE SURFACE, IN THE SLIDING SURFACE OF AT LEAST ONE OF SAID STATOR AND ROTOR, AN ELECTRICALLY NON-CONDUCTIVE LIQUID LUBRICANT PLACED IN SAID GROOVE, AND MEANS FOR RETAINING SAID LUBRICANT IN SAID GROOVE.
References Cited (Backward Citations)
US2217383A
Cited
US2535367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |