Process for impregnating a textile fabric
CA 2080487 C · Owner: Kaysersberg · Inventors: Dumas, Didier; Neveu, Jean-Louis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a process for impregnating a fibrous woven, knitted or nonwoven fabric with an aqueous liquid in particular of the type containing a treatment agent the textile fabric (6) is placed on an endless cloth (4) permeable to liquids the liquid is poured under gravity onto the textile fabric in the form of a liquid curtain or sheet transverse to the direction of motion of the latter and a vacuum slit (13) arranged below the cloth produces a vacuum sufficient for at least part of said liquid to pass through the textile fabric. The rate at which the liquid is poured defined with respect to the weight of the fabric passing below said liquid sheet is greater than a given value above which the …
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 10, 1991 and granted March 28, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 10, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 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.