Filter for filtering gaseous and liquid media
CA 2069486 C · Owner: Trabold, Hermann · Inventors: Trabold, Hermann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, The invention relates to a filter (1) for filtering gaseous and liquid media, in particular an oil filter for internal combustion engines, having a filter housing (2) and a filter packing (8) taken up in the filter housing and made of a porous deformable material e.g. a roll of, absorbent paper. To prevent the filter packing from being deformed and thereby preventing a smooth flow through the filter packing, stabilizing elements (12) e.g. stabilizing bars, are provided for fixing the form and position of the filter packing (8) in the filter housing.
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 September 24, 1991 and granted November 10, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 2013.
- 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.