Trigger sprayer having central vent cylinder
CA 2268877 A1 · Owner: Continental Sprayers International, Inc. · Inventors: Nelson, Philip L.; Foster, Donald D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid dispenser (20) comprising a dispenser body (22) having a pump mechanism (50) defining a variable volume fluid receiving cavity (116). A cylindric formation (130), smaller than the fluid receiving cavity (116) is , within the cavity (116) and a vent passageway (134) is in fluid communication with the cylindric formation (130). A plunger (132) is reciprocally moveable within the cylindric formation (130) and is configured for moving with the pump mechanism (50) as the pump mechanism (50) is moved between extended and contracted positions. The plunger (132) and cylindric formation (130) are configured such that the vent passageway (134) is in fluid communication with the fluid …
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 October 6, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 6, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 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.