Non-woven web having unique liquid resistance and dimensional stability
CA 2358627 A1 · Owner: Burkeen, Ricky · Inventors: Burkeen, Ricky; Blanpied, Robert H.; Bush, Philip
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A non-woven web such as a facer comprises recycled cellulose fiber; recycled glass fiber, and, a sizing agent which provides the mat with decreased liquid penetrability over time. An example suitable sizing agent is alkenyl succinic anhydride, (ASA) which has a dry basis add-on rate of from about 0.15% to about 0.4% and, preferably a dry basis add-on rate of from about 0.2% to about 0.3%. The sizing agent, provides the mat with decreased liquid penetrability four weeks after mat production. In one aspect of the invention the mats/facers can be employed as a facer for a rigid, cellular foam board.
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 October 10, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 10, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2023.
- 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.