Electron beam-graftable compound and product for its use
CA 2094308 A1 · Owner: Herring, Laura E. · Inventors: Nohr, Ronald S.; Macdonald, John G.; Herring, Laura E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound of the formula:, in which: (a) each of A and B independently is phenyl which may be unsubstituted or substituted;, (b) each of R1 and R2 independently is hydrogen or C1-C6 alkyl; (c) x represents an integer of from 0 to about 18; and (d) Z is poly(alkyleneoxy) which may be uncapped or capped with a C1-C6 alkyl group. The compound can be grafted to polyolefin nonwoven webs by electron beam radiation without significant homopolymerization. The grafted webs are wettable (hydrophilic) and capable of withstanding multiple rewets without substantial removal of grafted compound. The grafted webs are especially well-suited for use in disposable absorbent products. - 29 -
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 April 19, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 19, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 19, 2015.
- 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.