Heavy-weight nonwoven fabric of hydraulically- entangled fibers
CA 1234968 A · Owner: E.I. Du Pont De Nemours And Company · Inventors: Hwang, Sang-Hak
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TITLE, Heavy-Weight Nonwoven Fabric of Hydraulically-Entangled Fibers, ABSTRACT An improved process is provided for preparing a strong, heavy-weight, nonapertured nonwoven fabric of hydraulically entangled staple fibers of synthetic organic polymer. A heavy-weight batt of fibers immediately after having been wetted, is treated by a row of hydraulic jets which drives portions of fibers from one surface of the batt to the other.
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
- Granted April 12, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 12, 2005.
- 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.