Spray dispenser
CA 2111866 A1 · Owner: Williams, John E. (Deceased) · Inventors: Williams, John E. (Deceased)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A spray dispenser comprises a container (12) in which a product-containing bellows (80) is situated above an energy storing bellows (82). A piston (70) is disposed within the container (12) below the energy storing bellows (82). A sleeve (40 42) surrounds the, container and is threadedly connected with the piston (70) where by rotation of the sleeve (40, 42) relative to the container (12) causes the piston (70) to rise and compress the energy storing bellows (82). The energy storing bellows (82) thus pressurizes the product-containing bellows (80) to expel the product when the valve (60) is opened. The outer diameter of the bellows (80) is of progressively reduced diameter to enable 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 June 19, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 19, 2014.
- 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.