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Expired Canadian patentCanada

Liquid crystal light valve and associated bonding structure

CA 1289651 C · Owner: Hughes-Jvc Technology Corporation · Inventors: Sterling, Rodney D.

CIPO record

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

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Abstract From the Canadian patent

A LCLV device exhibiting improved performance capabilities fabricated using an amorphous silicon photoconductor layer (13), a cadmium telluride blocking layer (17), a titanium dioxide mirror (19) and a special bonding layer (15) which enables attachment of the cadmium telluride blocking layer (17) to the amorphous silicon (13). The bonding layer (15) includes silicon dioxide sputtered in successive argon and argon/oxygen atmospheres followed by cadmium telluride sputtered in successive argon/oxygen and argon atmospheres. The bonding layer (15) may also be used in other applications to bond a cadmium telluride layer to single crystal silicon or silicon dioxide layers.

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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

  • Granted September 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 24, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 11, 1988
GrantedSeptember 24, 1991
Term endedSeptember 24, 2008
Patent numberCA 1289651 C
Classification (IPC)G02F1/13 +2 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedAug 11, 1988Patent grantedSep 24, 1991Term endedSep 24, 2008

Sources & verification

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