|
US2175895A
|
|
Concrete wall construction
|
|
US2153837A
|
|
Insulating concrete construction
|
|
US2120468A
|
|
Expanded concrete and process of producing the same
|
|
US2136053A
|
|
Aluminum base alloy
|
|
US2132031A
|
|
Process of treating sulphide ores
|
|
US1844937A
|
|
Process of electrolytic copper refining
|
|
US1698098A
|
|
Heat-enduring metal
|
|
US1675709A
|
|
Heat-resisting alloy and structure
|
|
US1563573A
|
|
Heat-resisting alloy and structure, etc.
|
|
US1675708A
|
|
Alloy
|
|
US1552610A
|
|
Nickel anode and method of producing the same, etc
|
|
US1674438A
|
|
Process of producing nickel alloys
|
|
US1552609A
|
|
Nickel anode and process for manufacturing the same
|
|
US1704087A
|
|
Heat-resisting structure, etc.
|
|
US1726489A
|
|
Alloy, etc.
|
|
US1704086A
|
|
Method of cleaning and/or annealing metal
|
|
US1628149A
|
|
Manufacture of malleable nickel
|
|
US1382361A
|
|
Refining copper-nickel matte
|
|
US1395827A
|
|
Separating metals by electrolysis
|
