Apparatus and method for generating foam utilizing a randomly packed material
CA 2061879 A1 · Owner: Schnell, David J. · Inventors: Given, Kurt M.; Schnell, David J.; Weinberg, Edward A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method for producing foam from ingredients comprising air, water, surfactant and optionally a binder such as oil, polymers and/or lignin which are passed through the apparatus under pressure. The apparatus comprises a conduit having an inlet and an outlet, a generally spherical hollow packing material which is randomly packed within the conduit to aid in producing the foam and at least one connector to connect either end of the conduit to a device. In another embodiment, the apparatus comprises a mixer to mix the ingredients to produce a mixture thereof a pressurizing means, provide the ingredients to the device under pressure a conduit, comprising an inlet and an outlet so …
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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 February 26, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 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.