Thermoplastic, elastic polyurethanes
CA 1068441 A · Owner: Basf Aktiengesellschaft · Inventors: Hartmann, Heinrich; Vaeth, Guenter; Spoor, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Thermoplastic elastic polyurethanes, which are soluble in ethers and/or ketones and have a high surface hardness and high modulus of elasticity are manufactured from a polyester-ol and/or a polyether-ol, a substituted or unsubstituted diisocyanato-diohenylmethane or diisocyanato-diphenylsulfone, an aliphatic, branched-chain diol of the formula HOCH2-CR1R2-CO2OH, in which R1 is alkyl and R2 is alkyl or hydrogen, and, optionally, a triol.
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 December 18, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 18, 1996.
- 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.