Dosing cap
CA 2002519 C · Owner: Ortho Pharmaceutical Corporation · Inventors: Frazier, Thomas A.; Lambelet, Laurence E. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for dispensing predetermined amounts of viscous product. The apparatus has a conduit which is telescopingly received with a cap. The cap and conduit define an expandable dosing chamber which expands to a predetermined maximum volume when product is introduced into said chamber through said conduit. A check valve prevents back flow of product through the conduit. Collapsing the Chamber from its maximum volume to a minimum volume dispenses the product from the dosing chamber.
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 November 8, 1989 and granted January 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 8, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2011.
- 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.