AO Smith Corp
AO Smith CActive Patents
0
Total Holdings
77
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3624343A | Member drive system with constant velocity in a given plane | Expired / Lapsed | 1970-01-26 | 1971-11-30 | 23 | Details |
| US3612815A | Electron beam apparatus | Expired / Lapsed | 1970-01-16 | 1971-10-12 | 3 | Details |
| US3213677A | Flaw detection recording | Expired / Lapsed | 1962-06-28 | 1965-10-26 | 2 | Details |
| US3147362A | Composite consumable electrode containing emissive compound… | Expired / Lapsed | 1960-08-01 | 1964-09-01 | 2 | 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 |
| US3033730A | Method of forming a prestressed article of fiber reinforced… | Expired / Lapsed | 1956-11-07 | 1962-05-08 | 1 | Details |
| US3020745A | Method of flaw detection in a metal member | Expired / Lapsed | 1958-11-13 | 1962-02-13 | 0 | Details |
| US2972096A | Protection of a temperature sensitive device | Expired / Lapsed | 1957-11-26 | 1961-02-14 | 0 | Details |
| US2967959A | Ventilating apparatus for dynamoelectric machines | Expired / Lapsed | 1957-06-21 | 1961-01-10 | 0 | Details |
| US2952231A | Weld back-up construction | Expired / Lapsed | 1953-03-09 | 1960-09-13 | 0 | Details |
| US2932027A | Antenna | Expired / Lapsed | 1955-03-09 | 1960-04-05 | 0 | Details |
| US2911918A | Pump | Expired / Lapsed | 1956-11-26 | 1959-11-10 | 0 | Details |
| US2852295A | Clamp ring suspension | Expired / Lapsed | 1956-08-31 | 1958-09-16 | 0 | Details |
| US2838796A | Method and apparatus for pressure curing of materials | Expired / Lapsed | 1954-12-02 | 1958-06-17 | 0 | Details |
| US2815974A | Engine-generator coupling | Expired / Lapsed | 1955-04-29 | 1957-12-10 | 0 | Details |
| US2780271A | Apparatus for mechanically expanding large diameter pipe | Expired / Lapsed | 1951-09-27 | 1957-02-05 | 0 | Details |
| US2722171A | Silo | Expired / Lapsed | 1951-08-01 | 1955-11-01 | 0 | Details |
| US2692322A | Induction welding method and apparatus | Expired / Lapsed | 1950-11-24 | 1954-10-19 | 0 | Details |
| US2686957A | Method of manufacturing heat exchanger sections | Expired / Lapsed | 1951-08-17 | 1954-08-24 | 0 | Details |
| US2639902A | Digester tower | Expired / Lapsed | 1950-04-07 | 1953-05-26 | 0 | Details |
| US2594599A | Tank opening assembly | Expired / Lapsed | 1948-04-12 | 1952-04-29 | 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 |
| 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 |
| US2539903A | Piston fabrication | Expired / Lapsed | 1946-12-05 | 1951-01-30 | 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 |
| US2480369A | Manufacture of multilayer cylinder for high-pressure vessels | Expired / Lapsed | 1941-11-07 | 1949-08-30 | 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 |
| US2406947A | Centrifugal pump | Expired / Lapsed | 1944-08-30 | 1946-09-03 | 0 | Details |
| US2403079A | Joinder of porcelain enameled products | Expired / Lapsed | 1942-04-30 | 1946-07-02 | 0 | Details |
| US2401243A | Electric welding | Expired / Lapsed | 1943-04-09 | 1946-05-28 | 0 | Details |
| US2401231A | Hot-water tank and method of making the same | Expired / Lapsed | 1942-05-18 | 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 |
| US2371090A | Electric pipe forming | Expired / Lapsed | 1942-10-30 | 1945-03-06 | 0 | Details |
| US2366528A | Extrusion centering wire guide | Expired / Lapsed | 1942-03-09 | 1945-01-02 | 0 | Details |
| US2363980A | Head for glass-lined tanks | Expired / Lapsed | 1943-04-21 | 1944-11-28 | 0 | Details |
| US2363992A | Support for spherical pressure vessels | Expired / Lapsed | 1942-05-09 | 1944-11-28 | 0 | Details |
| US2363967A | Multilayer vessel | Expired / Lapsed | 1942-05-02 | 1944-11-28 | 0 | Details |
| US2359285A | Induction furnace | Expired / Lapsed | 1942-07-17 | 1944-10-03 | 0 | Details |
| US2340784A | Method and apparatus for upsetting pipe ends | Expired / Lapsed | 1942-11-19 | 1944-02-01 | 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 |
| US2335153A | Glass-lined head for tanks | Expired / Lapsed | 1942-04-25 | 1943-11-23 | 0 | Details |
| US2320708A | Submersible electrically driven pump | Expired / Lapsed | 1940-11-22 | 1943-06-01 | 0 | Details |
| US2266611A | Connection for glass lined tanks | Expired / Lapsed | 1940-05-18 | 1941-12-16 | 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 |
| US2209402A | Method of making pressure vessels | Expired / Lapsed | 1938-05-07 | 1940-07-30 | 0 | Details |
| US2179774A | Welded pressure vessel | Expired / Lapsed | 1935-12-07 | 1939-11-14 | 0 | Details |
| US2111791A | Welded seam for alloy liners in vessels | Expired / Lapsed | 1936-06-29 | 1938-03-22 | 0 | Details |
| US2104200A | Welding control apparatus | Expired / Lapsed | 1936-05-25 | 1938-01-04 | 0 | Details |
| US2022912A | Machine for forming automobile frames and the like | Expired / Lapsed | 1933-10-07 | 1935-12-03 | 0 | Details |
| US2011121A | Method of making welded irregular shaped hollow articles | Expired / Lapsed | 1934-06-06 | 1935-08-13 | 0 | Details |
| US2009078A | Method of and apparatus for cooling heated articles | Expired / Lapsed | 1932-02-25 | 1935-07-23 | 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 |
| 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 |
| US1919552A | Attaching grommets to metal plates | Expired / Lapsed | 1930-06-26 | 1933-07-25 | 0 | Details |
| US1844263A | Arc welding chill | Expired / Lapsed | 1929-11-16 | 1932-02-09 | 0 | Details |
| US1818985A | Pipe coupling | Expired / Lapsed | 1928-03-17 | 1931-08-18 | 0 | Details |
| US1523927A | Process and apparatus for making spiral tubing by electric … | Expired / Lapsed | 1923-10-11 | 1925-01-20 | 0 | Details |
| US1507958A | Rivet-heading machine | Expired / Lapsed | 1921-10-14 | 1924-09-09 | 0 | Details |
| US1409900A | Intermittingly-operating gear system | Expired / Lapsed | 1921-07-21 | 1922-03-21 | 0 | Details |