Ovenwares
CA 1252594 A · Owner: Sumitomo Chemical Co. Ltd. · Inventors: Asai, Kuniaki; Kobayashi, Tadayasu; Saito, Teruo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Ovenwares produced by molding a wholly aromatic polyester resin composition comprising 30 to 80 wt.% of a wholly aromatic polyester having a repeating unit represented by the general formula, wherein X is a C1-C4 alkylene group or -O- -SO2-, -S- or, -CO- group, m and n are 0 or 1 a d:e ratio is in the, range of from 1:1 to 10:1 an e:f ratio is in the range, of from 9:10 to 10:9 and the positions of substituents, at each aromatic ring of the foregoing general formula are para or meta to each other, 5 to 60 wt.% of wollastonite and 5 to 60 wt.% of titanium oxide.
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
- Granted April 11, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 11, 2006.
- 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.