Patent Explorer
Browse, filter, and analyze 7 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2587840A | Welded article and method of making the same | AO Smith Corp | Expired / Lapsed | 1945-09-12 | 1952-03-04 | 1965-09-12 | 0.0 yrs | 0 | |
| US2535917A | Propeller blade with a tubular backbone | AO Smith Corp | Expired / Lapsed | 1945-08-04 | 1950-12-26 | 1965-08-04 | 0.0 yrs | 0 | |
| US2457889A | Wide propeller blade manufacture | AO Smith Corp | Expired / Lapsed | 1943-10-23 | 1949-01-04 | 1963-10-23 | 0.0 yrs | 0 | |
| US2406947A | Centrifugal pump | AO Smith Corp | Expired / Lapsed | 1944-08-30 | 1946-09-03 | 1964-08-30 | 0.0 yrs | 0 | |
| US2384324A | Method of making hot-water tanks | AO Smith Corp | Expired / Lapsed | 1942-02-16 | 1945-09-04 | 1962-02-16 | 0.0 yrs | 0 | |
| US2239509A | Vitreous enamel tank connection and method of construction | AO Smith Corp | Expired / Lapsed | 1938-06-24 | 1941-04-22 | 1958-06-24 | 0.0 yrs | 0 | |
| US1523927A | Process and apparatus for making spiral tubing by electric welding | AO Smith Corp | Expired / Lapsed | 1923-10-11 | 1925-01-20 | 1943-10-11 | 0.0 yrs | 0 |