Polychromatic monolithic semiconductor assembly
CA 1075353 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Gaffre, Michel; Diguet, Daniel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PHF 75.557, ABSTRACT:, A polychromatic assembly comprising several electroluminescent semiconductor diodes formed by diffusion of islands localized in superimposed epitaxial layers of different compositions deposited on a semiconductor substrate or a semi-insulator each, epitaxial layer having a forbidden bandwidth smaller than that of the layer below which it is present. - 19 -
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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 April 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 8, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.