Syringe for the controlled discharge of viscous materials
CA 2132676 C · Owner: Eykmann, Rudolf · Inventors: Uhrig, Birgit; Eykmann, Rudolf; Schodel, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A syringe having a bearing divided at least once in the axial direction of a threaded rod into bearing parts. The bearing parts are held at a distance from one another and at a distance from the threaded rod by at least one expanding part. The bearing parts, on their surfaces facing the threaded rod, have surfaces which can be brought by external pressure into engagement with the threaded rod against the resistance of the bearing parts.
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 September 22, 1994 and granted June 20, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2016.
- 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.