Process for producing preformable continuous strand mats
CA 2001306 C · Owner: Owens Corning · Inventors: Dunbar, Sidney G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for forming a continuous strand preformable mat is disclosed which consists of applying a binder matrix material which includes a thermosetting polyester binder material and a thermoplastic polyester binder to the continuous strand mat. The mat is heated such that the thermosetting binder material cures and hardens while the thermoplastic binder material softens and flows around strand intersections. The mat is thereafter cooled in order to solidify the thermoplastic polyester material of the binder matrix for additional handling for packaging and for subsequent handling by the customer. The preforms are made by heating the mat to oven 93.3°C (200°F) placing in, a cold mold, and …
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 October 24, 1989 and granted March 22, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 24, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 2011.
- 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.