Variable proportion dispenser
CA 2097709 C · Owner: Habley Medical Technology Corporation · Inventors: Foster, Clark B.; Smedley, William H.; Haber, Terry M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a variable proportion dispenser and permits the user to adjust the proportions and amounts of the components dispensed from the cartridges during each delivery stroke. The variable proportion dispenser (2) includes a housing (4) which houses two pharmaceutical cartridges (6 7). A reciprocating drive assembly (10) includes a drive stem (36, 37) extending from the piston (46) of each cartridge a sliding body, (66) mounted to the housing and two one-way drive devices (54, 55) carried by the sliding body. Each one-way drive device includes a threaded dosage adjuster (60 61), and a, reciprocating, one-way driver (58 59) which drives the drive stem into the …
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 December 13, 1991 and granted December 15, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 2013.
- 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.