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Expired Canadian patentCanada

Light receiving members

CA 1255904 A · Owner: Canon Kabushiki Kaisha · Inventors: Honda, Mitsuru; Murai, Keiichi; Ogawa, Kyosuke

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

There is provided a light receiving member which comprises a support and a light receiving layer having a photosensitive layer composed of amorphous material containing silicon atoms and at least either germanium atoms or tin atoms and a surface layer, said surface layer being of multi-layered structure having at least an abrasionresistant layer at the outermost side and a reflection preventive layer in the inside, and said support having a surface provided with irregularities composed of spherical dimples. The light receiving member overcomes all of the problems in the conventional light receiving member comprising a light receiving layer composed of an amorphous silicon and in particular, …

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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 June 20, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 20, 2006.
  • 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 15, 1986
GrantedJune 20, 1989
Term endedJune 20, 2006
Patent numberCA 1255904 A
Classification (IPC)G03G5/08 +2 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedOct 15, 1986Patent grantedJune 20, 1989Term endedJune 20, 2006

Sources & verification

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