Optical data storage
CA 2333266 A1 · Owner: Hyrcynian Holdings Limited · Inventors: Burroughs, Trevor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a high capacity three-dimensional optically-addressed , storage device (1) comprising multiple juxtaposed storage layers (3 4, 5) , from which digital data stored in any given layer can be rapidly and reliably retrieved despite the presence of data stored in other layers and in , particular, the extreme proximity of data stored in neighbouring layers. In order to retrieve information stored in the device interrogating radiation is , projected through the device orthogonally to the layers possibly in a flood , beam but preferably in a beam defined by means of an electronic mask such as , a TFT array or a liquid crystal device. In any event the interrogating beam , is …
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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
- Filed March 23, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2021.
- 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.