Suspension poymerization
CA 1093747 A · Owner: Dow Chemical Of Canada, Limited · Inventors: Yu, John; Husband, Susan J.; Watts, Harry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Large particles are obtained in the suspension polymerization of styrene by employing an inorganic particulate suspending agent in the initial phase of polymerization and after about 20 to 40 weight percent conversion of monomer to polymer, a water-dispersible organic suspending agent is added. 25,760-F
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 13, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 13, 1998.
- 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.