Plastic envelope assembly air freshener dispenser device
CA 2255029 C · Owner: Martin, John · Inventors: Rosplock, Joseph M.; Martin, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides an air freshener dispenser device that is in the form of a plastic envelope which has a content of a volatile air freshener medium. In one embodiment the envelope is constructed of two elongated plastic membrane laminates which are sealed along a peripheral margin that frames a reservoir enclosure between the opposing membrane laminate inner surfaces. Each membrane laminate is composed of an inner vapor-permeable thin film and , an outer vapor-impermeable thin film. The reservoir enclosure additionally contains an unattached semi-ridig strip which has dimensions that closely approximate the area dimensions of the reservoir enclosure and which has at , least …
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 14, 1997 and granted November 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 14, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 14, 2019.
- 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.