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US3961225A Expired / Lapsed US ⏱️ 0.0 years remaining

Surge absorber

Assignee: Mitsubishi Mining and Cement Co Ltd
•
Filing: 1975-02-10
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Granted: 1976-06-01
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Expires: 1995-02-10
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Abstract

Abstract A novel gap type surge absorber is disclosed. The surge absorber comprises a plurality of carbon thin films isolated from each others at short distances attached to the surface of an insulating body and one material selected from the group consisting of a metal, an alloy and a conductive adhesive as an electrode fixed to each of the plural carbon thin films. The surge absorber is an element based on a new mechanism that when a surge voltage reaches a prescribed value, a discharge is generated owing to emission of electrons between the carbon thin films and thereby a creeping discharge is initiated between the electrodes. The surge absorber has a small electrostatic capacity as well as a small discharge lag and is capable of cutting off a follow current.

Inventors

  • 👤 Kan-ichi Tachibana
  • 👤 Michihiro Nishioka
  • 👤 Akio Uchida
  • 👤 Mikiya Ono

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 12:53
CPC Classifications
H; H01; H01T; H01T4/00; H01T4/16; H02; H02H; H02H9/00; H02H9/04; H02H9/06

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 76 words
A surge absorber comprising a plurality of carbon thin films isolated from each other respectively at a distance of 10μ - 100μ attached to the surface of an insulating body and a material selected from the group consisting of a metal, an alloy and a conductive adhesive as an electrode directly fixed to each of said plurality of carbon thin films respectively, said metal and alloy being both highly anticorrosive and having a high electric conductivity.
Claim 2
Dependent Claim 76 words
A surge absorber comprising a plurality of carbon thin films isolated from each other respectively at a distance of 10μ - 100μ attached to the surface of an insulating body and a material selected from the group consisting of a metal, an alloy and a conductive adhesive as an electrode directly fixed to each of said plurality of carbon thin films respectively, said metal and alloy being both highly anticorrosive and having a high electric conductivity.

References Cited (Backward Citations)

US2487057A Cited
US2942331A Cited
US2966608A Cited
US3292049A Cited
US3391371A Cited
US3530573A Cited
US3486221A Cited
US3535778A Cited
US3654511A Cited
US3827142A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-06-01 1979-12-01 1980-06-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-06-01 1983-12-01 1984-06-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-06-01 1987-12-01 1988-06-01 $7700.00 Window Closed / Lapsed

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