Production of large composite structures
CA 2223779 C · Owner: Hardcore Du Pont Composites, L.L.C. · Inventors: Pearson, Everett A.; Tunis, George C. Iii; Perrella, Andrew P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Large composite structures are produced using a vacuum assisted resin transfer molding process incorporating a resin distribution network. The resin distribution network is provided by a textured sheet (104) of metal formed as an integral vacuum bag and mold. The texture is formed by upraised portions (108) on one side of the sheet which correspond with depressions on the other side. Valleys between the upraised portions form the resin distribution network. A fiber lay up is placed against the textured sheet (104) with the upraised portions facing the lay up. Main feeder grooves (114) are also formed directly in the sheet (104). Resin is supplied under vacuum to the main feeder …
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 June 4, 1996 and granted August 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2018.
- 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.