Spraying apparatus
CA 2079747 A1 · Owner: Czewo-Plast Kunststofftechnik Gmbh · Inventors: Czech, Manuel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In conventional spraying apparatus material disposed, within a material container is kept by means of propellants at an increased pressure with respect to the ambient pressure. The material to be sprayed is dispensed with the aid of a dispensing valve to be operated in a manual way. To avoid the use of propellants which are harmful to the environment, the present invention suggests a spraying apparatus comprising a supply chamber which contains the material to be sprayed and includes a pressure chamber of variable volume. This pressure chamber of variable volume is connected to an actuating means which is provided for increasing the volume of the pressure chamber and thus for sucking …
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 2, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 2, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 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.