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:
Jan. 13, 1976
Filed:
Jun. 21, 1973
David Edmund Bays, London, EN;
Mervyn Evan Peel, London, EN;
David Martin Waters, London, EN;
Gwynn Pennant Ellis, Cardiff, WA;
Allen & Hanburys Limited, London, EN;
Abstract
Compounds of the general formula (I): ##SPC1## in which R.sub.1, R.sub.2 and R.sub.3 may be the same or different and each represents a hdyrogen atom, an alkyl group, a nitro group, a halogen atom or a group of the formula --NR.sub.4 R.sub.5 or --OR.sub.4 ; in which the groups R.sub.4 and R.sub.5 may be the same or different and each represent a hydrogen atom, or an alkyl, alkenyl or cycloalkyl group (which alkyl group may optionally be substituted by alkoxy, hydroxy, amino, alkylamino, dialkylamino or aryl groups) or R.sub.4 and R.sub.5 together with the nitrogen atom form a heterocyclic ring which may optionally contain additional hetero atoms, e.g. morpholino or piperazinyl; and R.sub.6 represents a hydrogen atom or an alkyl group. These compounds have biological activity, particularly in inhibiting the release of spasmogenic substances arising as a consequence of antigen-antibody reactions.