Syringe assembly for quantitative measurement of radioactive injectate
CA 2228425 C · Owner: Daxor Corporation · Inventors: Feldschuh, Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disposable single-use kit for administering a precise dose of radioactive tracer to a subject with an accuracy of at least 99.9 % by weight. The kit comprises a syringe (12) pre-filled with a known quantity of , a radioactive tracer as injectate (14). The back of a small-bore needle (20) is affixed to the syringe front. The front of a removable plastic needle cover (24) incorporates airtight stopper (22) for creating and maintaining an airlock in the needle front thereby to prevent any contact , between the tracer and the cover and so preclude any loss of tracer upon removal of the cover from the needle. A valve (30) normally seals the syringe back, the valve including actuatable means …
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 May 2, 1996 and granted January 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 2, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 2, 2018.
- 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.