The uses of aminoalkanolamide esters as processing aids for thermoplastics
CA 2115992 C · Owner: Lippmann, Andreas · Inventors: Ploog, Uwe; Krampitz, Dieter; Lippmann, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the use of aminoalkanolamide esters as processing aids, more particularly as lubricants and/or mold release agents, for thermoplastics. The aminoalkanolamide esters preferably used are derived from higher carboxylic acids such as, lauric acid, palmitic acid, stearic acid lauroleic acid, palmitoleic acid, oleic acid and behenic acid and also from mixtures of these acids.
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 August 11, 1992 and granted October 31, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 11, 2014.
- 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.