Flexible brush comprising a mixture of polymers
CA 2388020 A1 · Owner: Chan, John Geoffrey · Inventors: Xu, Xiao Dan; Wang, Ping; Chan, John Geoffrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a brush having a one-piece body comprised of a handle and at one end thereof a head provided with bristles wherein the brush body comprises a , mixture of first polymer and a second polymer that is of a lesser hardness than the first polymer, wherein the ratio of the first polymer to the second polymer is from about 95:5 to about 30:70.
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 October 20, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 20, 2021.
- 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.