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Expired Canadian patentCanada

Electroluminescent lamp devices using monolayers of electroluminescent materials

CA 1311517 C · Owner: Loctite Luminescent Systems, Inc. · Inventors: Eilertsen, Edward T.; Fleming, Gordon Ross

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Abstract From the Canadian patent

of the Invention, An electroluminescent (EL) lamp element and a process for making same. The EL lamp element has a monolayer of phosphor particles deposited in a resin binder material. The sizes of the particles are controllably pre-selected to lie within a selected range thereof. The thickness of the resin binder layer is about one-half that of the average particle size so that the tendency of the resin to migrate through the particles and to cover the surfaces of the particles is prevented. A second resin binder layer is then deposited over the exposed surfaces of phosphor particles to form a relatively thin monolayer of particles uniformly distributed in the resin binder layers. If …

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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 December 15, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 21, 1988
GrantedDecember 15, 1992
Term endedDecember 15, 2009
Patent numberCA 1311517 C
Classification (IPC)H05B33/10 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedNov 21, 1988Patent grantedDec 15, 1992Term endedDec 15, 2009

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