Flat textile structure for cleaning purposes
CA 2265469 C · Owner: Carl Freudenberg Kg · Inventors: Dreyer, Claude
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Flat textile structure for cleaning purposes with an all-over pile of fibers of different, degrees of fineness projecting from a carrier material (12) whereby fiber , regions (2, 6, 7) which consist of a plurality of individual fibers are present in the pile, the, average degree of fineness of the fibers differing from the average degree of fineness of fibers in surrounding zones (1).
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 June 28, 1997 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 28, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 28, 2019.
- 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.