Worthington Pump and Machinery Corp
WorthingtoActive Patents
0
Total Holdings
23
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2585168A | Compressor control circuit | Expired / Lapsed | 1947-08-21 | 1952-02-12 | 0 | Details |
| US2500774A | Water treating method and apparatus | Expired / Lapsed | 1946-08-03 | 1950-03-14 | 0 | Details |
| US2427422A | Water purifying apparatus having inlet water spray nozzles … | Expired / Lapsed | 1945-02-23 | 1947-09-16 | 0 | Details |
| US2386898A | Centrifugal pump | Expired / Lapsed | 1943-10-30 | 1945-10-16 | 0 | Details |
| US2372087A | Boiler feed pump control | Expired / Lapsed | 1942-09-29 | 1945-03-20 | 0 | Details |
| US2365293A | Water treating apparatus | Expired / Lapsed | 1941-04-25 | 1944-12-19 | 0 | Details |
| US2309938A | Cooling system for wind tunnels or similar enclosures | Expired / Lapsed | 1941-12-04 | 1943-02-02 | 0 | Details |
| US2254862A | Shaft seal for centrifugal machines | Expired / Lapsed | 1940-04-16 | 1941-09-02 | 0 | Details |
| US2227260A | Automatic control for high pressure pumps | Expired / Lapsed | 1938-11-17 | 1940-12-31 | 0 | Details |
| US2181978A | Variable capacity compressor | Expired / Lapsed | 1938-03-11 | 1939-12-05 | 0 | Details |
| US2174153A | Automatic check valve | Expired / Lapsed | 1937-11-13 | 1939-09-26 | 0 | Details |
| US2167369A | Variable capacity compressor | Expired / Lapsed | 1934-08-22 | 1939-07-25 | 0 | Details |
| US2034272A | Control mechanism for variable volume compressors | Expired / Lapsed | 1930-08-07 | 1936-03-17 | 0 | Details |
| US1986266A | Hole spotter for collaring drill holes | Expired / Lapsed | 1933-05-31 | 1935-01-01 | 0 | Details |
| US1874752A | Air or gas compressor | Expired / Lapsed | 1930-06-13 | 1932-08-30 | 0 | Details |
| US1837858A | Sampler | Expired / Lapsed | 1928-02-17 | 1931-12-22 | 0 | Details |
| US1704481A | Rotary machine, particularly in centrifugal pump | Expired / Lapsed | 1926-08-17 | 1929-03-05 | 0 | Details |
| US1634317A | Impeller balancing and sealing device | Expired / Lapsed | 1925-07-22 | 1927-07-05 | 0 | Details |
| US1607324A | Automatic plate valve | Expired / Lapsed | 1919-12-08 | 1926-11-16 | 0 | Details |
| US1586978A | Centrifugal pump | Expired / Lapsed | 1921-02-03 | 1926-06-01 | 0 | Details |
| US1578498A | Pump | Expired / Lapsed | 1924-10-29 | 1926-03-30 | 0 | Details |
| US1379173A | Pump-valve | Expired / Lapsed | 1918-04-03 | 1921-05-24 | 0 | Details |
| US1185942A | Air-compressor. | Expired / Lapsed | 1915-03-04 | 1916-06-06 | 0 | Details |