Expired Canadian patentCanada
Dental adhesive compositions and methods
CA 2525462 C · Owner: Liu, Huaibing · Inventors: Wang, Xiuling; Sang, Junjie; Liu, Huaibing
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Two-part and one-part self-etching dental adhesives containing polymerizable acidic monomers. Methods include one-~coat application without need for tooth etching.
Read the whole patent
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 13, 2004 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 13, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 13, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 13, 2004
GrantedJanuary 3, 2012
Term endedMay 13, 2024
Patent numberCA 2525462 C
Classification (IPC)—
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.