Nonwoven wiper having high oil capacity
CA 2048732 C · Owner: Kimberly-Clark Worldwide, Inc. · Inventors: King, Paul J.; Cotton, James D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present disclosure is directed to a nonwoven web useful for a wiper having an oil capacity greater than about 500 percent by weight of oil to the weight of the web. The wiper includes a nonwoven web of fibers having at least one raised surface area which area has an aperture through the web. The fibers generally adjacent the aperture are substantially unconsolidated, i.e. not compacted together or fused. The disclosure also deals with a method of forming such a nonwoven wiper. The method includes the steps of: a) providing a nonwoven web; b) providing a nip roller arrangement including a first roller having a plurality of unheated pins and a second roller having a plurality of …
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 August 8, 1991 and granted May 8, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 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.