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US3588757A Expired / Lapsed US ⏱️ 0.0 years remaining

Microwave filter utilizing multiplate technique in which dielectric coatings are applied to metal plates

Assignee: Siemens AG
•
Filing: 1968-10-10
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Granted: 1971-06-28
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Expires: 1988-10-10
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Abstract

Abstract A MICROWAVE CIRCUIT EMPLOYING MULTIPLATE TECHNIQUE IN WHICH TWO PLATES OF DIELECTRIC MATERIAL EACH CARRY ON ONE SIDE THEREOF A CONTINUOUS METAL LAYER AND ON THE OTHER SIDE CONDUCTOR TRACKS FORMING MICROWAVE CIRCUIT ELEMENTS, WITH SUCH PLATES BEING SUPERIMPOSED WITH THEIR SIDES CARRYING SUCH CONDUCTOR TRACKS IN OPPOSED RELATION, AND COMPRESSION FORCES APPLIED THERETO, CHARACTERIZED BY THE DIELECTRIC BEING IN THE FORM OF A RELATIVELY THINC COATING ON ONE SIDE OF RESPECTIVE RELATIVELY THICK METAL PLATES AND THE CONDUCTOR TRACKS BEING DISPOSED THE OUTER FACE OF THE RESPECTIVE DIELECTRIC COATINGS, THE RESPECTIVE PLATES AND ASSOCIATED DIELECTRIC COATINGS HAVING PERFORATIONS EXTENDING THERETHROUGH, THE WALLS OF THE APERTURES BEING COATED WITH A METALLIT LAYER EXTENDING FROM SELECTED CONDUCTOR TRACKS TO THE ASSOCIATED METAL PLATE TO CONDUCTIVELY CONNECT THE SAME.

Inventors

  • 👤 Ernst Andrascek
  • 👤 Erich Rosshaupter

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 22:55
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/02; H01P3/08; H01P3/081; H01P3/12; H01P3/13; H05; H05K; H05K1/00; H05K1/02; H05K1/0213; H05K1/0237; H05K1/14; H05K1/144; H05K3/00; H05K3/40; H05K3/42; H05K3/44; H05K1/03; H05K1/05; H05K1/056; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0344; H05K2201/0347; H05K2201/0364; H05K2201/037; H05K2201/09; H05K2201/09209; H05K2201/095; H05K2201/09554; H05K2201/10; H05K2201/10007; H05K2201/1006; H05K3/425; H05K3/427

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-06-27 1974-12-27 1975-06-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-06-27 1978-12-27 1979-06-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-06-27 1982-12-27 1983-06-28 $7700.00 Window Closed / Lapsed

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