Non-migrating hydrophilic silicone finish for hydrophobic substrates such as nonwovens
CA 2211695 C · Owner: Murphy, Gerald J. · Inventors: Parker, Dorothy E.; Murphy, Gerald J.; Sabia, Angelo J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a coated product which permits the transmission therethrough of aqueous liquid said product comprising a , substrate of porous hydrophobic material to which has been applied a coating selected from the, group consisting of compounds of the formula (see formula I), and mixtures thereof, where Me equals methyl R1 equals methyl or R2, and R2 =, C p H2p-(OC2H4)m-(OC3H6)n-OR' wherein x is about 0 to 200, y is about 0 to 50, p is, about 2 to 5, n is about 3 to 30 m is about 3 to 60, and R' is independently in each, occurrence hydrogen, an alkyl group with 1-4 carbons or an acetyl group, with the proviso that when y=0 R1 equals R2, and the values of x, y,n …
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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 July 28, 1997 and granted January 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 28, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 28, 2019.
- 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.