US2217265A
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Wood protection
|
US2114381A
|
|
Closure sealing means for cylinders and the like
|
US2022231A
|
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Preservation of vegetable-fiber material
|
US2029763A
|
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Apparatus for treating carbonaceous material
|
US2029759A
|
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Apparatus for the treatment of carbonaceous material
|
US1967990A
|
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Oil impregnation of wood
|
US1994607A
|
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Electrothermic process of shaping wood
|
US1981506A
|
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Froth production and frothproducing reagent
|
US2029762A
|
|
Method of treating carbonaceous material
|
US2029760A
|
|
Apparatus for treating carbonaceous material
|
US2029761A
|
|
Method of forming charges
|
US2011483A
|
|
Froth flotation apparatus and process
|
US1972588A
|
|
Froth-flotation process
|
US2046549A
|
|
Apparatus for impregnating timbers, ties, and the like
|
US1933969A
|
|
Closure for cylinders
|
US1961097A
|
|
Inhibiting process and product
|
US1961096A
|
|
Inhibiting process and product
|
US2033885A
|
|
Impregnating pitch and process and product utilizing it
|
US1995499A
|
|
Process for treating wood
|
US1902839A
|
|
Process of froth flotation and material employed to effect the same
|