Oral hygiene appliance
CA 2277918 C · Owner: Bohm-Van Diggelen, Bernd · Inventors: Bohm-Van Diggelen, Bernd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an oral hygiene appliance with a resilient-elastic plastic foam - like working piece on the head of a holding piece. The aim of the invention is to avoid possible penetration by cohesing or adhesion inside the foamed material by undesired bacteria viruses and dirt particles, as is , the case in hitherto known teeth cleaning appliances with elastic foamed materials. This aim is achieved in that the working piece consists of a stamping made of closed-cell foamed material (A) for example EVA-mixed , polymer foamed material whereby the cells (B) on the wall of the stamped hole are opened by the stamping.
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 January 18, 1998 and granted May 16, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 18, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 18, 2020.
- 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.