AO Smith Corp
AO Smith CActive Patents
0
Total Holdings
76
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US4002935A | Reciprocating linear motor | Expired / Lapsed | 1975-05-15 | 1977-01-11 | 8 | Details |
| US3612815A | Electron beam apparatus | Expired / Lapsed | 1970-01-16 | 1971-10-12 | 3 | Details |
| US3105786A | Method of forming a fiber-reinforced resinous spool | Expired / Lapsed | 1960-05-05 | 1963-10-01 | 2 | Details |
| US3102677A | Safety circuit for compressor drive | Expired / Lapsed | 1959-09-17 | 1963-09-03 | 2 | Details |
| US3046647A | Method of fabricating hemispherical multi-layer heads | Expired / Lapsed | 1959-03-03 | 1962-07-31 | 0 | Details |
| US3020745A | Method of flaw detection in a metal member | Expired / Lapsed | 1958-11-13 | 1962-02-13 | 0 | Details |
| US2991210A | Method of making a reinforced plastic vessel with an integr… | Expired / Lapsed | 1959-07-16 | 1961-07-04 | 2 | Details |
| US2987217A | Reinforced plastic article and structure for forming the sa… | Expired / Lapsed | 1959-05-08 | 1961-06-06 | 0 | Details |
| US2972096A | Protection of a temperature sensitive device | Expired / Lapsed | 1957-11-26 | 1961-02-14 | 0 | Details |
| US2932027A | Antenna | Expired / Lapsed | 1955-03-09 | 1960-04-05 | 0 | Details |
| US2893759A | Conically tapered screw-type casing joint with metal-to-met… | Expired / Lapsed | 1957-05-06 | 1959-07-07 | 0 | Details |
| US2852295A | Clamp ring suspension | Expired / Lapsed | 1956-08-31 | 1958-09-16 | 0 | Details |
| US2839442A | Process of making a lightweight structural panel | Expired / Lapsed | 1955-02-23 | 1958-06-17 | 2 | Details |
| US2820427A | Welding back-up assembly | Expired / Lapsed | 1953-10-01 | 1958-01-21 | 0 | Details |
| US2722171A | Silo | Expired / Lapsed | 1951-08-01 | 1955-11-01 | 0 | Details |
| US2643602A | Pressure protected silolike container for preserving farm c… | Expired / Lapsed | 1949-07-02 | 1953-06-30 | 0 | Details |
| US2613342A | Dynamic braking circuits for electric motors | Expired / Lapsed | 1949-11-02 | 1952-10-07 | 0 | Details |
| US2587840A | Welded article and method of making the same | Expired / Lapsed | 1945-09-12 | 1952-03-04 | 0 | Details |
| US2583814A | Flow controlled water heater | Expired / Lapsed | 1947-10-31 | 1952-01-29 | 0 | Details |
| US2573126A | Submersible electric motor | Expired / Lapsed | 1948-01-21 | 1951-10-30 | 0 | Details |
| US2551217A | Silo construction | Expired / Lapsed | 1946-04-17 | 1951-05-01 | 0 | Details |
| US2551216A | Silo | Expired / Lapsed | 1945-06-07 | 1951-05-01 | 0 | Details |
| US2535917A | Propeller blade with a tubular backbone | Expired / Lapsed | 1945-08-04 | 1950-12-26 | 0 | Details |
| US2524361A | Induction motor control | Expired / Lapsed | 1945-12-20 | 1950-10-03 | 0 | Details |
| US2493153A | Method and apparatus for applying sheet linings to cylinders | Expired / Lapsed | 1945-03-01 | 1950-01-03 | 0 | Details |
| US2493135A | Apparatus for heat-treating propellers and the like | Expired / Lapsed | 1943-12-21 | 1950-01-03 | 0 | Details |
| US2480369A | Manufacture of multilayer cylinder for high-pressure vessels | Expired / Lapsed | 1941-11-07 | 1949-08-30 | 0 | Details |
| US2477820A | Clothes drier | Expired / Lapsed | 1945-11-05 | 1949-08-02 | 0 | Details |
| US2469100A | Laminated magnetic core | Expired / Lapsed | 1947-08-21 | 1949-05-03 | 0 | Details |
| US2460422A | Clothes drier | Expired / Lapsed | 1945-07-28 | 1949-02-01 | 0 | Details |
| US2457889A | Wide propeller blade manufacture | Expired / Lapsed | 1943-10-23 | 1949-01-04 | 0 | Details |
| US2450137A | Multistage centrifugal pump | Expired / Lapsed | 1944-12-01 | 1948-09-28 | 0 | Details |
| US2440947A | Centrifugal pump with impeller supporting wear rings | Expired / Lapsed | 1945-01-11 | 1948-05-04 | 0 | Details |
| US2418258A | Centrifugal pump | Expired / Lapsed | 1944-08-18 | 1947-04-01 | 0 | Details |
| US2406947A | Centrifugal pump | Expired / Lapsed | 1944-08-30 | 1946-09-03 | 0 | Details |
| US2403076A | Electric flash welding | Expired / Lapsed | 1943-04-02 | 1946-07-02 | 0 | Details |
| US2401243A | Electric welding | Expired / Lapsed | 1943-04-09 | 1946-05-28 | 0 | Details |
| US2384324A | Method of making hot-water tanks | Expired / Lapsed | 1942-02-16 | 1945-09-04 | 0 | Details |
| US2381310A | Temperature control for electric heating | Expired / Lapsed | 1943-06-21 | 1945-08-07 | 0 | Details |
| US2377974A | Method of upsetting channel edges for welding | Expired / Lapsed | 1942-04-25 | 1945-06-12 | 0 | Details |
| US2372723A | Method of improving the stress distribution in multilayer h… | Expired / Lapsed | 1941-11-07 | 1945-04-03 | 0 | Details |
| US2371090A | Electric pipe forming | Expired / Lapsed | 1942-10-30 | 1945-03-06 | 0 | Details |
| US2363992A | Support for spherical pressure vessels | Expired / Lapsed | 1942-05-09 | 1944-11-28 | 0 | Details |
| US2361636A | Connection for hot-water tanks | Expired / Lapsed | 1942-08-20 | 1944-10-31 | 0 | Details |
| US2353477A | Hot-water tank connection | Expired / Lapsed | 1943-06-24 | 1944-07-11 | 0 | Details |
| US2340808A | Extrusion nozzle wire guide | Expired / Lapsed | 1941-07-10 | 1944-02-01 | 0 | Details |
| US2337247A | Method of making multilayer vessels | Expired / Lapsed | 1938-04-29 | 1943-12-21 | 0 | Details |
| US2335181A | Method of manufacturing grating | Expired / Lapsed | 1942-04-30 | 1943-11-23 | 0 | Details |
| US2320589A | Packing assembly | Expired / Lapsed | 1941-04-28 | 1943-06-01 | 0 | Details |
| US2306845A | Dynamometer | Expired / Lapsed | 1940-07-15 | 1942-12-29 | 0 | Details |
| US2266610A | Hot water tank connection | Expired / Lapsed | 1940-05-18 | 1941-12-16 | 0 | Details |
| US2253307A | Electrical circuit | Expired / Lapsed | 1938-02-18 | 1941-08-19 | 0 | Details |
| US2239509A | Vitreous enamel tank connection and method of construction | Expired / Lapsed | 1938-06-24 | 1941-04-22 | 0 | Details |
| US2217090A | Method of making multilayer pressure vessels | Expired / Lapsed | 1938-05-07 | 1940-10-08 | 0 | Details |
| US2209402A | Method of making pressure vessels | Expired / Lapsed | 1938-05-07 | 1940-07-30 | 0 | Details |
| US2192402A | Hydraulic motor | Expired / Lapsed | 1938-05-07 | 1940-03-05 | 0 | Details |
| US2179774A | Welded pressure vessel | Expired / Lapsed | 1935-12-07 | 1939-11-14 | 0 | Details |
| US2104200A | Welding control apparatus | Expired / Lapsed | 1936-05-25 | 1938-01-04 | 0 | Details |
| US2048937A | Enameling machine | Expired / Lapsed | 1932-08-13 | 1936-07-28 | 0 | Details |
| US2048912A | Enamel spraying apparatus | Expired / Lapsed | 1932-03-03 | 1936-07-28 | 0 | Details |
| US2039775A | Metal sealing cap for road parting strips | Expired / Lapsed | 1934-05-14 | 1936-05-05 | 0 | Details |
| US2039128A | Power press drive and control | Expired / Lapsed | 1934-12-03 | 1936-04-28 | 0 | Details |
| US1995492A | Device for determining the composition of fluid bodies in m… | Expired / Lapsed | 1928-06-11 | 1935-03-26 | 0 | Details |
| US1976298A | Temperature control | Expired / Lapsed | 1933-09-23 | 1934-10-09 | 0 | Details |
| US1940242A | Pipe storage apparatus | Expired / Lapsed | 1931-08-24 | 1933-12-19 | 0 | Details |
| US1939732A | Welded floor structure | Expired / Lapsed | 1930-06-23 | 1933-12-19 | 0 | Details |
| US1936693A | Weldrod for arc welding | Expired / Lapsed | 1930-01-21 | 1933-11-28 | 0 | Details |
| US1934065A | Method of making lined nozzles | Expired / Lapsed | 1931-10-05 | 1933-11-07 | 0 | Details |
| US1925118A | Pressure vessel and method of fabricating it | Expired / Lapsed | 1931-05-05 | 1933-09-05 | 0 | Details |
| US1921228A | Spacer for piling pipe | Expired / Lapsed | 1931-08-17 | 1933-08-08 | 0 | Details |
| US1842298A | Underground pipe line | Expired / Lapsed | 1929-02-11 | 1932-01-19 | 0 | Details |
| US1834499A | Electric crane | Expired / Lapsed | 1930-06-13 | 1931-12-01 | 0 | Details |
| US1818985A | Pipe coupling | Expired / Lapsed | 1928-03-17 | 1931-08-18 | 0 | Details |
| US1643225A | Method of making axle housings | Expired / Lapsed | 1922-08-03 | 1927-09-20 | 0 | Details |
| US1523927A | Process and apparatus for making spiral tubing by electric … | Expired / Lapsed | 1923-10-11 | 1925-01-20 | 0 | Details |
| US1441250A | Electromagnetic device for serving rivets to nailing machin… | Expired / Lapsed | 1920-07-26 | 1923-01-09 | 0 | Details |