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Serving leading biopharmaceutical companies globally:

Boehringer Ingelheim
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Generated: December 15, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,024,163

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Summary for Patent: 4,024,163

Title: Insecticides
Abstract:New insecticides are of formula: ##STR1## wherein R.sup.1 represents hydrogen or a methyl group; R.sup.2 represents hydrogen or a halogeno or lower alkyl group; R.sup.3 represents hydrogen or a halogeno, lower alkyl (which is different to R.sup.2 when R.sup.2 represents a lower alkyl group) or carbo(loweralkoxy) group which contains at least 2 carbon atoms in the lower alkoxy residue when R.sup.2 represents methyl or R.sup.2 and R.sup.3 together with the carbon atom to which they are attached represent a cycloalkylene ring having at least one endocyclic carbon to carbon double bond; with the proviso that (a) R.sup.2 and R.sup.3 each represent hydrogen only when R.sup.1 represents methyl and (b) R.sup.3 contains at least 2 carbon atoms when R.sup.1 and R.sup.2 each represent hydrogen; and R represents a group which form insecticidal esters with chrysanthemic acid e.g. 5-benzyl-3-furylmethyl, 3-phenoxybenzyl, .alpha.-cyano-3-phenoxybenzyl. The esters are prepared by forming the ester linkage conventionally or by a Wittig reaction using a 3-formyl- or 3-acetyl-2,2-dimethyl cyclopropane carboxylic acid esterified with the desired residue or by an alkyl group which is subsequently converted to the desired residue.
Inventor(s): Elliott; Michael (Harpenden, EN), Janes; Norman Frank (Luton, EN), Pulman; David Allen (Harpenden, EN)
Assignee: National Research Development Corporation (London, EN)
Application Number:05/497,056
Patent Claim Types:
see list of patent claims
Compound; Composition; Use;

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Foreign Priority and PCT Information for Patent: 4,024,163

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
24809/72May 25, 1972
24810/72May 25, 1972
30838/72Jun 30, 1972
59184/72Dec 21, 1972
20539/73Apr 30, 1973

International Patent Family for Patent: 4,024,163

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina223447► Subscribe
Australia5610573► Subscribe
Australia7224974► Subscribe
Belgium800006► Subscribe
Belgium818811► Subscribe
Brazil7303782► Subscribe
Canada1008455► Subscribe
Canada1045632► Subscribe
Switzerland583513► Subscribe
Switzerland585177► Subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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Serving leading biopharmaceutical companies globally:

Daiichi Sankyo
Farmers Insurance

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