Optical logic element and optical logic device
CA 2257936 A1 · Owner: Nordal, Per-Erik · Inventors: Nordal, Per-Erik; Gudesen, Hans Gude; Leistad, Geirr I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical logic element (OLE), particularly a multistate multistable optical , logic element, and even more particularly a proximity-addressable optical logic element, comprises an optical memory substance (1) which can transfer , from one physical or chemical state to a second physical or chemical state. The memory substance (1) is provided in or on a layer-like structure and an , activator (2) which generates a magnetic electromagnetic or electrical field , or supplies energy to the memory substance (1) and an optical detector for detection of the memory substance's optical response conditional on the memory substance's physical or chemical state is provided in or adjacent to the , …
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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 June 12, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 2019.
- 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.