Absorbent articles and methods for their preparation
CA 1065294 A · Owner: The Dow Chemical Company · Inventors: Burkholder, Nelson D. (Jr.)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a composition useful to form water swellable articles and to a method of preparing a water swellable polyelecrolyte coating film, or, fiber. The composition comprises (1) a soluble carboxylic polyelectrolyte characterized as a partially saponified polyacrylate polymer, (2) a soluble crosslinking agent reactive with carboxylate groups characterized as a polyamido-polyamine/epichlorohydrin adduct and (3) a, solvent consisting of water lower alcohols, or mixtures, thereof. The method comprises (a) forming the composition of a polyacrylate polymer, a polyamido-polyamine/epichlorohydrin adduct, and a solvent, (b) forming a coating film, or fiber;, and (c) drying the …
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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
- Granted October 30, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 30, 1996.
- 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.