Hydrophilic lubricious coatings
CA 2007884 C · Owner: Union Carbide Chemicals And Plastics Company Inc. · Inventors: Fan, You-Ling
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A new method is provided to impart a hydrophilic lubricious coating onto articles such as medical devices. A device, for example a catheter is, first contacted with a polyisocyanate solution to, provide coupling, then contacted with a polycarboxylic acid) solution to give a coating and is, then finally oven dried. These coatings have lubricity that only becomes manifest upon exposure to water or body fluids, and moreover, are also long lasting and have good abrasion resistance. This combination of properties is not available from other currently used or proposed coatings such as Teflon?.
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 16, 1990 and granted July 12, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 16, 2012.
- 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.