Bioactive and hydrophilic coating of polymeric substrates
CA 2259073 A1 · Owner: Spannenkrebs, Dorothea · Inventors: Anders, Christine; Spannenkrebs, Dorothea
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a process for forming a hydrophilic and bioactive coating on a surface of a polymer substrate in, which a hydrophilic or hydrophilized polymer substrate is treated with a polyalkyleneimine as a primer or with ammonia plasma, and a hydrophilic, bioactive coating polymer that contains (a) a carboxyl or carboxylate group (b) a sulfonic, acid or sulfonate group or (c) a sulfuric acid ester or sulfate group is applied to this pretreated substrate. The coated substrate can be used for technical medico-technical, hygienic, or biotechnical purposes.
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 12, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 12, 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.