Photo-reactive benzocyclobutenones and polymers therefrom for self-photocuring, photo-crosslinking and photopatterning without catalysts
CA 2346149 A1 · Owner: Wang, Zhi Yuan · Inventors: Gao, Jian Ping; Kuang, Li; Wang, Zhi Yuan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Functionalized derivatives of benzocyclobutenone of formula I and II herein are photoreactive and maybe employed in the production of a variety of self-curable polymer composition which may be employed as photoresist compositions, pressure sensitive adhesives hot melt adhesives, and sealants; the polymer compositions may be cured or cross-linked by UV or Vis radiations.
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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 May 2, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 2, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 2, 2023.
- 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.