| 201 |
Process for concentrating ores |
US37073229 |
1929-06-13 |
US1820172A |
1931-08-25 |
FRANK AYER; ARTHUR CROWFOOT |
|
| 202 |
Selective agent for concentrating ores |
US32258828 |
1928-11-28 |
US1792544A |
1931-02-17 |
ROYER LUCKENBACH |
|
| 203 |
Concentration of tin minerals |
US6610525 |
1925-10-31 |
US1638279A |
1927-08-09 |
SNELLING WALTER O |
|
| 204 |
Method of preparing ores for flotation |
US13457626 |
1926-09-09 |
US1620761A |
1927-03-15 |
HENDRICKSON HARRY H |
|
| 205 |
Adhesive coating for ore-receiving surfaces |
US18664417 |
1917-08-16 |
US1448927A |
1923-03-20 |
ROYER LUCKENBACH |
|
| 206 |
Office |
US1335612D |
|
US1335612A |
1920-03-30 |
|
|
| 207 |
Apparatus for separating ores by flotation. |
US2242515 |
1915-04-19 |
US1218400A |
1917-03-06 |
HAULTAIN HERBERT E T |
|
| 208 |
Method of concentrating ores. |
US1912735936 |
1912-12-10 |
US1116642A |
1914-11-10 |
STEVENS WILLIAM SYDNEY |
|
| 209 |
Ore-separator. |
US1911651502 |
1911-09-27 |
US1081360A |
1913-12-16 |
BROWN CHARLES HENRY |
|
| 210 |
Endless-belt ore-concentrator. |
US1911649735 |
1911-09-16 |
US1033219A |
1912-07-23 |
WALL ENOS A |
|
| 211 |
Process of separation. |
US1910548730 |
1910-03-11 |
US980035A |
1910-12-27 |
WENTWORTH HENRY A |
|
| 212 |
Process of separation. |
US1908449058 |
1908-08-18 |
US970002A |
1910-09-13 |
WENTWORTH HENRY AZOR |
|
| 213 |
Apparatus for separating ores by flotation |
US1904237585 |
1904-12-19 |
US912783A |
1909-02-16 |
BAVAY AUGUSTE JOSEPH FRANCOIS DE |
|
| 214 |
Separation of metals from their ores. |
US1905268611 |
1905-07-07 |
US899149A |
1908-09-22 |
WOLF JACOB D |
|
| 215 |
Process of separating zinc-blende by flotation. |
US1904237655 |
1904-12-19 |
US864597A |
1907-08-27 |
BAVAY AUGUSTE JOSEPH FRANCOIS DE |
|
| 216 |
Apparatus for separating minerals. |
US1906308345 |
1906-03-27 |
US851599A |
1907-04-23 |
LATIMER JAMES FRANCIS |
|
| 217 |
Means for effecting aqueous separation. |
US1904211781 |
1904-06-09 |
US795823A |
1905-08-01 |
DARLING JAMES D |
|
| 218 |
Separation of the metallic constituents of ores from gangue. |
US1904187599 |
1904-01-02 |
US763260A |
1904-06-21 |
CATTERMOLE ARTHUR EDWARD |
|
| 219 |
Classification of the metallic constituents of ores. |
US1903175060 |
1903-09-29 |
US763259A |
1904-06-21 |
CATTERMOLE ARTHUR EDWARD |
|
| 220 |
Apparatus for the separation of minerals by the selective action of oils, &c. |
US703905D |
|
US703905A |
1902-07-01 |
ELMORE A S |
|
