Preparing individualized polycarboxylic acid crosslinked cellulosic fibers
CA 2185547 C · Owner: The Procter & Gamble Company · Inventors: Naieni, Shahrokh A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In preparing individualized polycarboxylic acid crosslinked fibers defibration requirements are reduced to obtain a particular wet responsiveness and satisfactory absorbency properties are maintained even without washing or bleaching and washing and improved dry, resiliency is obtained by using a reduced surface tension solution of polycarboxylic acid crosslinking agent.
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 March 10, 1995 and granted January 30, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 10, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2017.
- 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.