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US3775176A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of forming an electroplatable microporous film with exposed metal particles within the pores

Assignee: WR Grace and Co
•
Filing: 1971-02-23
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Granted: 1973-11-27
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Expires: 1991-02-23
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Abstract

Abstract Rendering non-conductive substrates electroplatable by firmly bonding and uniting thereto an electroplate-receptive coating comprising a film-forming thermoplastic organic polymer and electrically conductive metallic particles having a largest dimension in the range of about 0.02 to 50 microns, the solids portion of the coating comprising at least about 20 percent by volume of a film-forming polymer and at least about 25 percent by volume of metallic particles, the coating further having a microporous structure to a depth of at least about 1 micron from the exposed surface thereof, and this microporous structure having about 40 to 90 percent open space, with the major portion of the open space being provided by pores with a largest dimension between about 0.1 to 15 microns, and with the metallic particles exposed in this microporous structure.

Inventors

  • 👤 R Cross
  • 👤 A Testa
  • 👤 R Thompson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 13:21
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02; C; C25; C25D; C25D5/00; C25D5/54; C25D5/56; B05D5/00; B05D5/12; H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/188

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

US3267007A Cited
US2360650A Cited
GB876858A Cited
US3014818A Cited
US3259559A Cited
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US3305460A Cited
US3347724A Cited
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US3466232A Cited
US3632704A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-11-26 1977-05-28 1977-11-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-11-26 1981-05-28 1981-11-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-11-26 1985-05-28 1985-11-27 $7700.00 Window Closed / Lapsed

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