Medical sponge with x-ray contrast agent
CA 1309850 C · Owner: Groitzsch, Dieter · Inventors: Klein, Bernhard; Schaut, Gerhard; Groitzsch, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing a surgical sponge which contains contrast agent embedded in a polymer matrix in proportions of up to 70 wt %. The matrix consists of a polymer material free of plasticisers. In the process a matrix for the contrast agent is used which is an uncross-linked, viscous, liquid in pre-polymer state until after it has been extruded onto the basic fleece material, and not until a process step that then follows is the polymerization completed.
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
- Granted November 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 2009.
- 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.