Filter with quick-change coupling for cleaning gases
CA 2113516 A1 · Owner: De Kuyper, Ewit · Inventors: De Kuyper, Ewit; Van Der Maas, Marinus Frans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title: Filter with quick-change coupling for cleaning gases ABSTRACT, The invention relates to a filter for cleaning gases provided with a quick-change coupling having an inlet and an outlet channel, and a hollow filter material housing filled with filter material through which, in operation the gas to, be cleaned flows. According to the invention the filter, material housing and the quick-change coupling are manufactured from materials that do not react with the gases to be cleaned and which do not release any substances during operation. The filter material housing may for instance be manufactured from glass and the quick-change coupling from stainless steel.
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 January 14, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 14, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 14, 2016.
- 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.