Adsorbent
CA 1262367 C · Owner: Tanaka, Tomio · Inventors: Itoh, Hiroshi; Nitta, Atsuhiko; Tanaka, Tomio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, This invention relates to an adsorbent obtained by water-insolubilizing a homopolymer of one of N,N-disubstituted (meth)acrylamides represented by the belowdescribed formula, a copolymer of two or more of the N,N-di-substituted (meth)acrylamides or a copolymer of one or more of the N,N-di-substituted (meth)acrylamides and one or more copolymerizable monomers other than the N,N-di-substituted (meth)acrylamides:, or wherein R1 means a hydrogen atom or methyl group A, stands for , n being 4 - 6, or , and R2 denotes a methyl or ethyl group. The thusobtained adsorbent has such a property that it is hydrophobicized to have higher adsorbability when heated and its …
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 October 17, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 17, 2006.
- 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.