Large polyester containers and method for making same
CA 2297008 C · Owner: Eastman Chemical Company · Inventors: Sprayberry, Harold Blake
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present application relates to a large molded polyester container weighing greater than about 200, and preferably between about 200 and about 800 grams. Specifically, the present application relates to polyester containers having a volume of several gallons. In one embodiment the container is a bottle formed from a diacid component comprising up to about 96.5 mol % therephthalic acid or naphtalene dicarboxylic acid and a glycol component wherein said polyester , possesses an IV of about 0.75 to about 0.85.
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 July 24, 1998 and granted December 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 24, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 2020.
- 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.