Liquid sprayer
CA 2045152 C · Owner: Yoshino Kogyosho Co. Ltd. · Inventors: Saito, Tadao; Mizushima, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention has its object, the provision of a liquid sprayer capable of spraying a long time and a simple construction with respect to liquid sprayers having a cylinder and a piston. In order to accomplish this object the liquid, sprayer according to the present invention is constructed so as to have a long piston stroke, and has an operating member up- and downwards,slidably located on the container body having a cylinder, a stem hung from this operating member and fitted into said cylinder, a trunk-like piston being provided at the lower end of the stem sliding in the cylinder together with the up- and downward movements of the operating member a spring provided in, 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 October 5, 1990 and granted June 4, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2012.
- 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.