Biocide dispenser and method of applying biocide to a surface
CA 1163603 A · Owner: Shell Internationale Research Maatschappij B.V. · Inventors: Tester, Stuart A.; Twydell, Roland S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dispenser for the application of biocide to a surface comprising a reservoir containing a fluid or semi-fluid formulation of the biocide and having an outlet closed by a plug which, on frictional contact with the surface releases the biocide formulation onto the surface. Suitable plugs include porous felt, spring-loaded valves and movable balls and the biocide formulation is conveniently retained in the reservoir by a cellular filling. There is also provided a method for the control of insects and/or fungi by the use of such a dispenser to apply insecticide or fungicide to an appropriate surface.
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 March 13, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 13, 2001.
- 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.