Polyarylene sulfide resin composition
CA 2032969 A1 · Owner: Polyplastics Co. Ltd. · Inventors: Uota, Katsumi; Serizawa, Hajime; Sano, Hiroyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyarylene sulfide resin composition comprises:, (A) 100 parts by weight of a polyarylene sulfide resin, (B) 0.05 to 15 parts by weight of potassium carbonate or light magnesium carbonate or a mixture of them, and, (C) 0 to 400 parts by weight of an inorganic filler selected from among fibrous fillers particulate fillers and platy fillers or a mixture of them. Any potassium carbonate is used. The light magnesium carbonate is magnesium hydroxycarbonate different from magnesite, and can prevent contaminants from depositing on a mold and rollers, resulting in a good appearance of a molded article of the composition. The molding operation and work gets easier.
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 December 21, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2012.
- 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.