|
DE419434C
|
|
Production of filter sheets from granular material in centrifuges
|
|
DE408354C
|
|
Manufacture of boron carbide
|
|
DE390794C
|
|
Process for the production of emerald-like green corundum
|
|
DE385374C
|
|
Process for the production of green corundum with a color similar to epido
|
|
DE400310C
|
|
Process for the production of aldol from acetaldehyde
|
|
DE413724C
|
|
Process for the preparation of chlorine derivatives of methane
|
|
DE379026C
|
|
Tanning process
|
|
DE391745C
|
|
Process for the preparation of bromine derivatives of methane
|
|
DE377227C
|
|
Tanning process
|
|
GB171956A
|
|
Method for the production of a condensation product from naphthalene and glycollic acid
|
|
DE380593C
|
|
Tanning process
|
|
DE398256C
|
|
Process for the preparation of resinous condensation products
|
|
DE380577C
|
|
Process for the preparation of resinous condensation products
|
|
DE354864C
|
|
Process for the preparation of condensation products from naphthalene and glycolic acid
|
|
DE325638C
|
|
Process for the preparation of sodium and potassium formate
|
|
DE386012C
|
|
Process for the preparation of compounds with a tanning and filling effect
|
|
DE386930C
|
|
Process for the preparation of tanning agents
|
|
GB116503A
|
|
Furnace for Carrying Out Endothermic Gas Reactions.
|
|
DE344878C
|
|
Process for the preparation of derivatives of the aryl ethers of high molecular weight aliphatic alcohols, which are readily soluble in water
|
|
DE381957C
|
|
Process for the pure representation of formats
|
