Fine bubble generating apparatus
CA 2045123 A1 · Owner: Sasaki, Hiroshi · Inventors: Oaki, Hiroshi; Sasaki, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fine bubble generating apparatus aiming at reducing diameters of bubbles generated through outer surface of a hollow yarn by giving a running speed to liquid contacting the surface of the yarn without utilizing mechanical power developed by a pump or the like. The fine bubble generating apparatus comprises a cylindrical device (1, 4 or 11) which is open in the upper and lower ends thereof and disposed in a liquid stored in a liquid vessel (8), the lower of the cylindrical device spaced apart from the inner surface of the bottom of the vessel; a passage (6 or 6a) which is narrow in width and formed inside the cylindrical device so as to extend vertically and whose upper and lower ends are …
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 November 16, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 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.