Hot melt adhesive having controllable water solubility
CA 2347291 A1 · Owner: Wang, Baoyu · Inventors: Wang, Baoyu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A water sensitive hot melt adhesive composition based on polyalkyleneimine copolymers for use with articles such as paper products disposable nonwoven , products, tapes, labels and packaging materials. By varying the amount of copolymer included in the composition as well as by varying the chain structure and the ratio of soluble versus insoluble repeating units in the copolymer, an adhesive may be formulated to modify the degree of solubility from 100 % to 0 % soluble in water and/or other performance characteristics. The adhesive composition includes about 10 % to about 70 % by weight, of a , polyalkyleneimine copolymer or a bland of one or more polyalkyleneimine copolymers; about …
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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 October 20, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 20, 2021.
- 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.