Pump dispensers
CA 1088900 A · Owner: Unilever Limited · Inventors: Gamadia, Rustom K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hand operated pump dispenser adapted to be fitted to a fluid container to dispense the fluid as a spray has a discharge reservoir in the form of a bellows having an inlet closed by a one way valve allowing fluid into the bellows and a finger operated discharge valve the, bellows being charged and discharged by movement of the inlet relative to the housing, the charging movement of the bellows inlet also energising an energy storage spring and being effected either by rotation or downward pressure on a first actuating member.
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
- Granted November 4, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 4, 1997.
- 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.