Non-woven fabric construction for detergent pouch
CA 2042129 A1 · Owner: Mack, Robert J. · Inventors: Mack, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
IR#4688, NON WOVEN FABRIC CONSTRUCTION FOR DETERGENT POUCH, ABSTRACT OF THE DISCLOSURE The present invention relates to the, production of a non-woven web material for use in detergent pouches. The non-woven web is produced from fibers which shrink on contact with water. The fibers when wetted, pucker to provide intersticing through which detergent particles can pass. For strengthening the pouch, non-water sensitive fibers can he incorporated in the non-woven web.
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 May 8, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 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.