序号 | 专利名 | 申请号 | 申请日 | 公开(公告)号 | 公开(公告)日 | 发明人 |
---|---|---|---|---|---|---|
21 | Process of extracting valuable components from raw materials | US10667716 | 1916-06-29 | US1373731A | 1921-04-05 | HORNSEY JOHN W |
22 | Process of obtaining alkali-metal compounds from silicates containing the same. | US1912689049 | 1912-04-06 | US1087132A | 1914-02-17 | MESSERSCHMITT ANTON |
23 | Method of recovering cyanids. | US1901047059 | 1901-02-12 | US687258A | 1901-11-26 | ORR WILLIAM |
24 | Edward william parnell and james simpson | US343673D | US343673A | 1886-06-15 | ||
25 | Improvement in purifying brine for manufacture of salt | US121994D | US121994A | 1871-12-19 | ||