Rubber mixtures, and rubber articles and motor vehicle tyres produced therefrom
CA 1251296 A · Owner: Hoechst Aktiengesellschaft · Inventors: Weil, Joachim; Sattelmeyer, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Rubber mixtures which can be easily processed and have good mechanical properties and are based on synthetic and/or natural grades of rubber, the usual additives also being used contain, a copolymer with a melt viscosity of not more than 150 Pa.s. measured at 180°C, of, a) 4 to 95% by weight of at least one alkyl ester of .alpha..beta.ethylenically unsaturated mono- and/or di-carboxylic acids which contains 1 to 12 carbon atoms in the alcohol radical b) 0.5 to 15% by weight of at least one amide of .alpha..beta.-ethylenically unsaturated mono- and/or di-carboxylic acids c) 0.2 to 10% by weight of at least one .alpha..beta.-ethylenically unsaturated mono- and/or di-carboxylic acid and d) 0 …
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 March 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 14, 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.