Ethylene-vinyl acetate copolymerization process
CA 1106546 A · Owner: El Paso Polyolefins Company · Inventors: Vandegaer, Jan E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the production of ethylene-vinyl acetate copolymers in a free radical catalyst initiated high pressure process, explosive decomposition is prevented by contacting the reactor effluent downstream of the reactor outlet with small amounts of free radical scavenger such as a hindered phenolic compound separat-, ing unreacted monomer from the mixture of copolymer un-, reacted monomer and scavenger in a separation zone and recycling the separated monomer to the reactor. -i-
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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.