Water-absorbent resin composition
CA 1330868 C · Owner: Sakamoto, Yuji · Inventors: Sakamoto, Yuji; Nakamura, Morio; Obayashi, Shigeji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract:, The present invention is directed to a waterabsorbent resin composition having superior gel stability which comprises a water-absorbent resin at least one, oxygen-containing reducing inorganic salt and optionally, at least one organic antioxidant. The water-absorbent resin composition is suitable for water-absorbent articles for example diapers, tampons, sanitary napkins and the like.
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
- Granted July 26, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 26, 2011.
- 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.