Process for the manufacture of synthetic leather
CA 2385307 A1 · Owner: Groitzsch, Dieter · Inventors: Jorder, Kurt; Groitzsch, Dieter; Lorenz, Horst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for producing synthetic leather from a nonwoven containing microfibers. According to the invention the production , method involves processing a thermoplastic microfiber with a titer of 0.05 to 1.0 dtex and hot-water soluble fibers with a titer of 4 to 6 dtex in a weight % ratio of 90:10 to 30:70 to form a non-woven having a surface area weight of 80 to 1000 g/m2. Said non-woven is impregnated with an aqueous binding agentdispersion of a viscoelastic substance with a weight ratio of 25:75 to 75:25 of non-woven viscoelastic substance whereby fixation of said viscoelastic substance is achieved by cross-linking or vulcanization and the hot-water soluble …
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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 15, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 15, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 15, 2022.
- 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.