Multilayer dual optical disk
CA 2590597 C · Owner: Ostrover, Lewis S. · Inventors: Bell, Alan; Ostrover, Lewis S.; Smith, Wayne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A data disc (40) consists of several layers (42 44, 45, 46, 48), including at , least one layer (46) conforming to a first format a first protocol, and a , second layer (45) conforming to a second format a second protocol. The , formats can include CD DVD (46), HD a BD formats and the layers may be physical, logic or application layers.
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 December 23, 2005 and granted July 12, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 23, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.