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GB353921A
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Improvements in and relating to the production and purification of salicylic acid or?-cresotinic acid or their salts
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GB316444A
|
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Improvements in and relating to the production of salts of aromatic hydroxyaldehydes
|
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GB317347A
|
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Improvements in and relating to the production of 3-alkoxy-4-hydroxy benzaldehydes and derivatives thereof
|
|
GB316703A
|
|
Improvements in and relating to the separation, isolation and purification of aromatic hydroxy acids
|
|
GB318939A
|
|
Improvements in and relating to the separation, isolation, and purification of aromatic hydroxy aldehydes
|
|
GB317381A
|
|
Improvements in and relating to the production of aromatic hydroxyaldehydes
|
|
US1613402A
|
|
Exterminating injurious forms of life and composition therefor
|
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US1725656A
|
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Process of treating materials to render them undesirable as a habitation for insects
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GB261055A
|
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Process for the extermination of insects
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GB261241A
|
|
Process and compositions for exterminating insects and weeds
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GB253993A
|
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Improvements in treatment of materials for combatting vermin and compositions suitable therefor
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CA275901A
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Insecticide
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CA263598A
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Insect hindering process
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