Aromatic polyester-polyorganosiloxane block copolymer
CA 1312397 C · Owner: Nakata, Akira · Inventors: Suehiro, Misayo; Mori, Hiroshi; Yamamoto, Naoki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed an aromatic polyesterpolyorganosiloxane block copolymer constituted of a polyester segment constituted mainly of: (a) an aromatic polyester constituted of an aromatic dicarboxylic acid and a dihydric phenol a lower aliphatic, diol or an alicyclic diol (b) an aromatic polyester constituted of an aromatic hydroxycarboxylic acid, or, (c) a copolymer constituted of (a) and (b) and a polyorganosiloxane segment having a recurring unit represented by the following formula:, (in this formula R1, R2 and R3 means the groups as, specified in the specification) of which bonding part between the polyester segment and the polyorganosiloxane segment is an ester linkage formed by a …
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 January 5, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 5, 2010.
- 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.