Process for manufacturing carbon fiber pellets, pellets resulting therefrom and process for producing reinforced thermoplastic resins employing the pellets
CA 2196172 C · Owner: Jenkins, William M. · Inventors: Jenkins, William M.; Secrist, Duane R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Carbon fiber pellets having improved flow characteristics are prepared by mixing chopped carbon fibers with a solution or suspension of a sizing agent shaping the agglomerated mixture on a tilted rotating surface to provide dense pellets of streamlined shape and drying the pellets. The carbon fiber pellets are especially suitable for use in the manufacture of reinforced thermoplastic resins.
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 3, 1995 and granted February 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 3, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 3, 2017.
- 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.