Material comprising polyrotaxane and polymer and process for producing the same
CA 2598309 C · Owner: The University Of Tokyo · Inventors: Kidowaki, Masatoshi; Ito, Kohzo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A material which comprises a polyrotaxane and a polymer and is crosslinked by irradiation with light. In the material which comprises a first polyrotaxane , and a polymer the first polyrotaxane comprises first cyclic molecules a , first linear molecule with which the first cyclic molecules are clathrated in a spitted state, and first blocking groups disposed respectively at both ends of the first linear molecule so as to prevent the first cyclic molecules from being released from the first linear molecule. The first polyrotaxane combines with at least part of the polymer through the first cyclic molecules by photocrosslinking reaction.
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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 February 21, 2006 and granted December 10, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 21, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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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.