Foam dispensing gun
CA 2186474 C · Owner: Finn, Clifford J. · Inventors: Finn, Clifford J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A foam dispensing gun has a body (10) with a depending handle (11). The body has two passageways (12 13) divided into forward, and rearward portions by an intermediate chamber. A hose connector and duck-bill one-way valve (25) are mounted in the rearward portion of each passageway, and a valve member (31) extends through both the forward and rearward portions of each passageway. The valve member has a conical needle valve (35) mating with a conical valve seat (37) that opens directly to the nose of the body (40). A trigger lever (51) is pivotally mounted in the chamber and engages the valve members to open and close the valves. A disposable nozzle (65) with a mixing chamber (66) and outlet …
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 March 10, 1995 and granted April 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 10, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2017.
- 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.