Dorr Oliver Inc
Dorr OliveActive Patents
0
Total Holdings
15
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US4036153A | Fluid bed incinerator feed system | Expired / Lapsed | 1975-07-03 | 1977-07-19 | 7 | Details |
| US4021184A | Dilute phase waste incinerator | Expired / Lapsed | 1975-10-02 | 1977-05-03 | 9 | Details |
| US3781141A | Air pressure actuated single-acting diaphragm pump | Expired / Lapsed | 1971-07-12 | 1973-12-25 | 5 | Details |
| US3401798A | Cylindrically stacked and spirally configured semi-permeabl… | Expired / Lapsed | 1965-01-04 | 1968-09-17 | 0 | Details |
| US3259244A | Screen with open conduit feed | Expired / Lapsed | 1963-01-31 | 1966-07-05 | 1 | Details |
| US3030892A | Diaphragm pump | Expired / Lapsed | 1960-02-23 | 1962-04-24 | 0 | Details |
| CA593047A | Processing low grade sulfur ores | Expired / Lapsed | — | 1960-02-23 | 0 | Details |
| US2913112A | Hydrocyclone control | Expired / Lapsed | 1956-11-26 | 1959-11-17 | 0 | Details |
| US2894635A | Sealing means for rotary drum filters | Expired / Lapsed | 1956-07-23 | 1959-07-14 | 0 | Details |
| US2870908A | Hydrocyclones in closed-circuit grinding operations | Expired / Lapsed | 1954-12-17 | 1959-01-27 | 0 | Details |
| US2867429A | Calcination of alumina | Expired / Lapsed | 1957-03-25 | 1959-01-06 | 2 | Details |
| US2867506A | Producing sulphur dioxide gas | Expired / Lapsed | 1956-07-18 | 1959-01-06 | 0 | Details |
| US2829771A | Process and apparatus for classifying solid materials in a … | Expired / Lapsed | 1953-01-06 | 1958-04-08 | 0 | Details |
| US2816658A | Hydrocyclones | Expired / Lapsed | 1954-10-11 | 1957-12-17 | 0 | Details |
| US2799394A | Method and apparatus for the separation of solids from liqu… | Expired / Lapsed | 1953-08-19 | 1957-07-16 | 0 | Details |