The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 09, 1980
Filed:
Jul. 17, 1979
Ross J Cozens, Mossley Hill, GB;
James R Jennings, Hutton Rudby, GB;
Philip J Hogan, Runcorn, GB;
Lawrence F Kelly, Canberra, AU;
Imperial Chemical Industries Limited, London, GB;
Abstract
Novel phosphinites and phosphonites of general formula: ##STR1## where R.sub.2 is an electron-donating substituent, R.sub.1 and R.sub.3 are electron-donating substituents or hydrogen atoms, provided that they are not both hydrogen atoms, or either R.sub.1 or R.sub.3 forms part of a fused alicyclic ring with R.sub.2, R is alkyl or cycloalkyl, and n and m are integers, each being either 1 or 2, provided that (m+n) equals 3, and when n is 2, the substituents on each aromatic ring may be the same or different, and their use as catalysts for the dimerisation of acrylonitrile to give predominantly straight-chain C.sub.6 dimers.