Rubber composition
CA 1338446 C · Owner: Sumitomo Chemical Company, Limited · Inventors: Nuno, Tatsumi; Ebina, Chinehito; Ishii, Tamaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Dynamic properties of valcanized rubber are improved, without accelerating scorching property remarkably nor deteriorating flex-cracking resistance by, incorporating in a filler-containg natural or synthetic rubber composition, a dinitrodiamine derivative represented by the general formula, wherein A represents a divalent aliphatic group a, divalent cycloaliphatic group, a divalent aromatic group or a group represented by the formula -CH2-X-CH2wherein X represents a cycloalkylene group or a phenylene group, provided that if A represents a cycloaliphatic group or an aromatic group, the two carbon atoms in A which are bonding to the nitrogen atom are not vicinal to each other; R and R' …
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 July 9, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 2013.
- 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.