Liquid sprayer
CA 2073022 C · Owner: Mizushima, Hiroshi · Inventors: Mizushima, Hiroshi; Nozawa, Takamitsu; Saito, Tadao
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 of a long spraying 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 is adapted to be able to spray liquid steadily without loosening a spraying head or a piston with a long stroke being used. In the liquid sprayer according to the present invention provided with an erecting wall having an upper end portion engaged with the upper portion of said cylinder and being, attached to the inner or outer surface of said neck portion; an …
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 August 14, 2001. 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.