Brush with plano-concave profile
CA 2208317 C · Owner: L'Oreal · Inventors: Gueret, Jean-Louis H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Brush (200) comprising a straight shaft (201) defining a main axis (X-X) a flexible core (202) having two ends, one end being solidly attached to this shaft bristles (204) inserted radially into this core with the tips of the bristles defining the surface (205) of the brush this surface consisting of a first face the intersection of all meridian planes passing through the main axis with the surface of the brush defining two crest lines (207) having a specific curvature; the brush is characterized in that the core is curved the crest lines (207) are concave, and the first face (207.1) is relatively straight and parallel to the main axis (X-X).
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 June 6, 1997 and granted October 26, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 6, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 2019.
- 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.