Improved surface-enhanced raman optical data storage system
CA 2131813 C · Owner: Martin Marietta Energy Systems, Inc. · Inventors: Vo-Dinh, Tuan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved Surface-Enhanced, Raman Optical Data Storage System (SER-ODS) is disclosed. In the improved system entities capable of existing in multiple reversible states are present on the storage device. Such entities result in changed Surface-Enhanced Raman Scattering (12) (SERS) when localized state changes are effected in less than all of the entities. Therefore by changing the state of entities in, localized regions of a storage device the, SERS emissions in such regions will be changed. When a write-on device is, controlled by a data signal such localized, regions of changed SERS emissions will correspond to the data written on the, device. The data may be read by illuminating 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 October 5, 1992 and granted December 16, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2014.
- 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
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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.