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Canadian application, no grantCanada

Printed circuit board

CA 2109383 A1 · Owner: Duxbury, Guy M. · Inventors: Duxbury, Guy M.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A plurality of pairs of parallel conductive wires are supported by a flexible non-conductive sheet, equidistant from two conductive ground meshes which sandwich the wires therebetween. Each mesh forms a matrix, defining an array of intersecting conductors. The offset of the intersections from the conductive wires incrementally changes along the longitudinal axes of the pair of conductive wires. This ensures the capacitance between each conductive wire and the mesh is substantially balanced regardless of where the conducive wires run so that cross talk, between the pairs of conductive wires will remain relatively low.

Read the whole patent

Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Filed October 27, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 27, 2013.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 2015.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 27, 1993
GrantedNo grant recorded
Term endedOctober 27, 2013
Patent numberCA 2109383 A1
Classification (IPC)H05K1/02

Timeline

Timeline From CIPO dates

1994199619982000200220042006200820102012Application filedOct 27, 1993Term endedOct 27, 2013

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.