Polyester resins containing dicyclopentadiene
CA 1162346 B · Owner: The Dow Chemical Company · Inventors: Nelson, Donald L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polyester resins are produced which are modified with C10 hydrocarbon concentrate. They are superior to the known resins containing the hydrocarbon concentrate in that the dicarboxylic acid or anhydrides used in the preparation of the resins are hydrolyzed with water before or during the reaction of the hydrocarbon concentrate with the other resinous monomers.
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 August 4, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 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.