Process for producing pet articles with low acetaldehyde
CA 2269930 A1 · Owner: Turner, Sam Richard · Inventors: Nicely, Vincent Alvin; Nelson, Gregory Wayne; Turner, Sam Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention discloses a process for producing molded shaped or , extruded articles comprising the steps of: a) melt reacting in the presence , of a catalyst which is substantially free of Co compounds at least one glycol , and at least one dicarboxylic acid to form a polyester having an I.V. of at least about 0.5 dL/g, wherein said at least one glycol is selected from the group consisting of glycols having up to 10 carbon atoms and mixtures thereof and said dicarboxylic is selected from the group consisting of alkyl dicarboxylic acids having 2 to 16 carbon atoms aryl dicarboxylic acids having , 8 to 16 carbon atoms and mixtures thereof; b) adding an acetaldehyde reducing …
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
- Filed October 28, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 28, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2019.
- 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.