Oxazoline and/or oxazine-modified polymers
CA 1069245 A · Owner: The Dow Chemical Company · Inventors: Madison, Norman L.; Chamberlin, Thomas A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Graft copolymers prepared by reacting oxazolines or oxazines with cross-linked vinyl aromatic polymers having pendant halomethyl groups on the aromatic rings. As macroporous beads they are especially useful for removing phenolics from aqueous waste streams, and color bodies from bleached Kraft pulp effluent.
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 January 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 1997.
- 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.