Biodegradable shaped article with a resistant coating and means for exposing the core, and a process for making said article
CA 2128012 A1 · Owner: Wexler, Fred C. · Inventors: Wexler, Fred C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An article having a biodegradable inner core and a resistant outer coating has exposure means for exposing the inner core to the environment after completion of the useful life of the article. Preferred embodiments of the article include razors toothbrushes, etc. The invention also relates to processes for making such articles.
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 December 16, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 16, 2014.
- 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.