Polymer surfaces for blood-contacting surfaces of a biomedical device, and methods for forming
CA 1206668 A · Owner: Thoratec Laboratories Corporation · Inventors: Ward, Robert S. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Invention, A polymer admixture is formed from at least 95 volume % of a base polymer and less than 5 volume % of a polymer additive including at least first and second different homopolymer chains in graft or block copolymer form. The first chains are characterized by a low critical surface tension but with a tendency to exudate while the second ones lower this tendency. This polymer mixture is formed into the exposed blood-contacting surface of a biomedical device. A preferred additive is a block copolymer of (a) polydialkylsiloxanes and (b) a polyurethane.
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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
- Granted June 24, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 24, 2003.
- 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.