Device for using filtering separators
CA 2234186 C · Owner: Schulz, Peter · Inventors: Schulz, Peter; Wolff, Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A portable device for use in filtering separators with, in particular, bag-, pouch-, or cartridge-shaped filtering means has a hose- or tube-shaped air conveyance section at one end of which is a surface contact fitting. An air conveyor that generates an air flow in at least one direction is arranged in the air conveyance section and has a pressure gauge to sense and display the pressure in the air flow, and an air flow meter and/or an air volume meter with a display. 70233-87
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 April 7, 1998 and granted July 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2020.
- 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.