Improved scratch and scuff resistant polymer
CA 2266545 C · Owner: Du Pont De Nemours International S.A. · Inventors: Szekely, Peter Laszlo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a scratch resistant polymer composition having a polymer that includes a copolyetherester elastomer said polymer having a hardness of from 25D to 82D and a fluorosurfactant, having a nonionic organic head and a tail of the formula CF3-(CF2)x-CH2CH2 where x is an integer from 3 to 15.
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 March 22, 1999 and granted January 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 22, 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.