Library and Archives Canada
Library anActive Patents
0
Total Holdings
16
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3635582A | Seals for hydraulic machines | Expired / Lapsed | 1970-03-16 | 1972-01-18 | 11 | Details |
| US3405913A | Rotary seal structure | Expired / Lapsed | 1967-12-04 | 1968-10-15 | 0 | Details |
| US3279378A | Starting means for an hydraulic pump | Expired / Lapsed | 1964-12-02 | 1966-10-18 | 2 | Details |
| US3253816A | De-aeration of sealing fluid in aerated rotary fluid machin… | Expired / Lapsed | 1965-03-12 | 1966-05-31 | 2 | Details |
| US3236499A | Differential pressure control of sealing fluid for rotary f… | Expired / Lapsed | 1964-06-05 | 1966-02-22 | 2 | Details |
| US3188050A | Seals for turbo-machinery | Expired / Lapsed | 1963-06-19 | 1965-06-08 | 2 | Details |
| US3174719A | Francis turbines and centrifugal pumps | Expired / Lapsed | 1962-06-12 | 1965-03-23 | 2 | Details |
| US3172640A | Dry band francis turbines | Expired / Lapsed | 1963-04-08 | 1965-03-09 | 2 | Details |
| US3098502A | Valve and dash-pot assembly | Expired / Lapsed | 1961-04-21 | 1963-07-23 | 2 | Details |
| US3081975A | Seals for turbines and pumps | Expired / Lapsed | 1959-03-26 | 1963-03-19 | 2 | Details |
| US2402063A | Papermaking machine | Expired / Lapsed | 1942-05-04 | 1946-06-11 | 0 | Details |
| US2358650A | Hydraulic press | Expired / Lapsed | 1941-10-07 | 1944-09-19 | 0 | Details |
| US2246379A | Valve control mechanism for hydraulic presses | Expired / Lapsed | 1938-11-18 | 1941-06-17 | 0 | Details |
| US2243642A | Drum hoist | Expired / Lapsed | 1939-03-28 | 1941-05-27 | 0 | Details |
| US2223792A | Hydraulic apparatus for operating machine tools and the like | Expired / Lapsed | 1938-04-12 | 1940-12-03 | 0 | Details |
| US1989955A | Joining separate bodies | Expired / Lapsed | 1932-05-18 | 1935-02-05 | 0 | Details |