Thermoplastic polyester compositions containing polymeric additives
CA 1069641 A · Owner: Emery Industries · Inventors: O'Brien, William L.; Williams, Frederick R.; Mains, Harold E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The flow characteristics and rheological properties of thermoplastic polyesters and copolyesters are significantly improved by the addition of 0.01 - 20% by weight of a particularly defined polyamide resin thereto namely, one having a number molecular weight of from 5,000 to 50,000 obtained from, the reaction of a high molecular weight aliphatic or cycloaliphatic dibasic acid containing from 18 to 52 carbon atoms and up to 30 weight percent based, on the total acid charge, of a short-chain saturated, aliphatic dibasic acid, containing from 2 to 13 carbon atoms with an aliphatic saturated diamine containing from 2 to 10 carbon atoms or a mixture of the diamines. In addition to improving the …
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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 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- 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.