Dry powder inhaler delivery system
CA 2217672 C · Owner: Elan Pharmaceuticals, Inc. · Inventors: Eisele, Robert F.; Titzler, David; Cameron, Allan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A powder storage and delivery system for a drug powder inhaler (20) has a carrier disk (46) with a blister shell (54) sealed by a shear layer (56). A tab (48) is adhered to the shear layer (56) underneath the blister shell , (54). The carrier disk (46) is placed into a dry powder inhaler (20). An actuator (80) pushes against the tab (48) causing the shear layer (56) to , tear away releasing the powder drug contents (62) from the blister into the dry powder inhaler (20). A disk carrier (130) has bursting blisters (132) with a brittle blister shell (132) sealed with a foil lid (150) and covered by a , plate (136). An actuator (160) moves against the plate (136) causing the , plate (136) …
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 March 13, 1996 and granted September 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 13, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 13, 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.