Dorr Co
Dorr CoActive Patents
0
Total Holdings
20
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2650084A | Calcining lime bearing sludges | Expired / Lapsed | 1949-02-26 | 1953-08-25 | 2 | Details |
| US2648433A | Process and apparatus for controlling the density of the ap… | Expired / Lapsed | 1950-12-05 | 1953-08-11 | 0 | Details |
| US2625464A | Roasting of sulfides | Expired / Lapsed | 1949-05-24 | 1953-01-13 | 1 | Details |
| US2600253A | Fertilizer manufacture | Expired / Lapsed | 1949-01-21 | 1952-06-10 | 2 | Details |
| US2596580A | Treating arsenical gold ores | Expired / Lapsed | 1950-01-05 | 1952-05-13 | 2 | Details |
| US2596954A | Process for reduction of iron ore to magnetite | Expired / Lapsed | 1947-06-06 | 1952-05-13 | 2 | Details |
| US2548642A | Calcining decrepitating rocks, including limestone | Expired / Lapsed | 1948-06-11 | 1951-04-10 | 2 | Details |
| US2517051A | Apparatus for conducting ion exchange operations | Expired / Lapsed | 1949-06-03 | 1950-08-01 | 0 | Details |
| US2458893A | Apparatus for conducting ion exchange operations | Expired / Lapsed | 1945-10-06 | 1949-01-11 | 0 | Details |
| US2365221A | Apparatus and method for conducting ionic exchange operatio… | Expired / Lapsed | 1942-02-28 | 1944-12-19 | 0 | Details |
| US2340842A | Apparatus for treating impure liquids | Expired / Lapsed | 1943-08-24 | 1944-02-01 | 0 | Details |
| US2340848A | Apparatus for treating impure liquids | Expired / Lapsed | 1941-12-18 | 1944-02-01 | 0 | Details |
| US2324400A | Liquid clarification | Expired / Lapsed | 1941-06-21 | 1943-07-13 | 0 | Details |
| US2291772A | Combined flocculation and sedimentation apparatus | Expired / Lapsed | 1940-01-24 | 1942-08-04 | 0 | Details |
| US2240371A | Pump | Expired / Lapsed | 1939-12-14 | 1941-04-29 | 0 | Details |
| US2165889A | Aeration of liquids | Expired / Lapsed | 1936-07-17 | 1939-07-11 | 0 | Details |
| US2101080A | Raking mechanism for sedimentation tanks | Expired / Lapsed | 1935-01-04 | 1937-12-07 | 0 | Details |
| US1619807A | Treatment of pulps | Expired / Lapsed | 1923-04-18 | 1927-03-08 | 0 | Details |
| US1515702A | Pump diaphragm | Expired / Lapsed | 1922-05-24 | 1924-11-18 | 0 | Details |
| US1399181A | Automatic control of reactions | Expired / Lapsed | 1919-12-26 | 1921-12-06 | 0 | Details |