Process for forming a powdered sulfonated epdm terpolymer
CA 1181894 A · Owner: Exxon Research And Engineering Company · Inventors: Klein, Robert R.; Makowski, Henry S. (Deceased)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a process for the forming of a powdered composition of a sulfonated EPDM terpolymer, having less than 1.25 wt. % ENB wherein the powder has a particle size distribution of from about 500 to about 3,000 microns a water, content of less than 2 wt. %, and a sulfonate content of less than 250 meq./100g polymer.
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 29, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 2002.
- 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.