Soft polysiloxanes having a pressure sensitive adhesive
CA 2178922 C · Owner: Schering-Plough Healthcare Products, Inc. · Inventors: Dever, Gerald R.; Feret, Ronald M.; Bracken, Ronald L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An article comprising a soft, polysiloxane elastomer having a hardness of 5-55 durometer units (Shore 00) the elastomer having a, pressure sensitive adhesive on at least one of its surfaces is described. A process for bonding a pressure sensitive adhesive to the soft polysiloxane elastomeric is also describe.
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 19, 1994 and granted April 10, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2016.
- 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.