Method for recycling the water soluble resin in the injection molded product
CA 2060442 C · Owner: Mauro, James J. · Inventors: Mauro, James J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method for recycling the water soluble resin from the polymer suspension wherein dissolving the core made of water soluble resin with deionized water or some solution concentrating the resin by separating water from the polymer suspension, drying the concentrated resin by completely removing the remained moisture therein to produce dried resin, and crushing and pelletizing the dried resin to make pellet shaped resin, thereby the recovered resin has the same physical or chemical characteristics as that of virgin resin and can be reused for being mixed with virgin resin.
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 January 31, 1992 and granted April 22, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 31, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 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.